網上免費存取資源

• Directory of Open Access Books: DOAB
• Directory of Open Access Journals: DOAJ
• InTech
• OAPEN Library
• Open Access | PLOS
• Open Access Journals - OMICS Group
• Open access journals | Elsevier
• Open Access Journals Search Engine (OAJSE)
• Project Gutenberg: Free ebooks
• SpringerOpen books
• UM Digital Library Portal
• Wiley Open Access