• Findebookee

http://findebookee.com/

• Google books

http://books.google.com

• Hathitrust Digital Library

http://www.hathitrust.org/

• Literature Collection – Free literature online

http://www.literaturecollection.com/

• Open Library

http://openlibrary.org/

• The eBook Directory

http://www.ebookdirectory.com/

• The Online Books Page

http://onlinebooks.library.upenn.edu/webbin/book/browse?type=subject&c=c&key=Language

• Thư viện ebook Vietlion.com

http://vietlion.com/ebk/download-ebook-category/doc-sach-online/hoc-tieng-anh-doc-sach-online

• Thư viện số của trường ĐH Phạm Văn Đồng

http://thuvienso.pdu.edu.vn/tailieuvn/khoa-hoc-xa-hoi/van-hoc-viet-nam/tat-ca-tai-lieu-khoa-hoc-xa-hoi-van-hoc-viet-nam.9.95.html