Britannica Academic is a multi-disciplinary reference resource designed for college and academic libraries providing access to over 100,000 articles; 1,000s of  illustrations, including photographs, etc.

De Gruyter Academic Publishing is an independent academic publisher, they publish over 1,500 books and 16,000 journal articles every year, across 30 subject areas. This includes more than 200 books and 6,000 articles in open access. 

Emerald Insight provides seamless access to high-quality, impactful journals, books, case studies, and a growing collection of open access content to a global audience.

Knovel has a very good collection of different reference books, research papers, articles,
handbooks and manuals for a wide variety of engineering domains.

ScienceDirect is the world’s leading source for scientific, technical, and medical research. Explore journals, books and articles.

Wiley is the international scientific, technical, medical, and scholarly publishing business of John Wiley & Sons, with strengths in every major academic and professional field and partnerships with many of the world’s leading societies.

World Scientific publishes about 600 new titles a year and 130 journals in various fields. Many of its books are recommended texts adopted by renowned institutions such as Harvard University, California Institute of Technology, Stanford University and Princeton University.

Ateneo de Manila University Journals Online – AJOL, a portal that gives you access to the university’s journals in the arts, philosophy, language and literary studies, theology, management, history, and social science.

The American Journal of Physics is a publication of the American Association of Physics Teachers (AAPT). Issues are published 12 times per year.

The ACM Digital Library is a research, discovery and networking platform containing, the full-text Collection of all ACM publications, including journals, conference proceedings, technical magazines, newsletters and books.

JSTOR full runs of more than 2,800 top scholarly journals in the humanities, social sciences, and sciences. JSTOR works with a diverse group of nearly 1,200 publishers from more than 57 countries to preserve and make their content digitally available.

Taylor & Francis Group’s journal program provides a home for validated, trusted research from the world’s brightest and best minds.

The Philippine E-Journals (PEJ) is an online collection of academic publications of different higher education institutions and professional organizations. Its sophisticated database allows users to easily locate abstracts, full journal articles, and links to related research materials.

Frontiers Media is a publisher of peer-reviewed open access scientific journals
currently active in science, technology and medicine.

UPOU Publications is a repository of university-produced publications and journals.

Turnitin solutions promote academic integrity, streamline grading and feedback, deter plagiarism, and improve student outcomes.

EBSCO Discovery Service is an all-inclusive search solution that makes in-depth research easy.

Scopus combines an expertly curated abstract and citation database with enriched data and linked scholarly literature across a wide variety of disciplines.