DOAB Directory of Open Access Books
2020
Project Muse Open Access ebooks
2020
Books at JSTOR: Open Access
2024
OAPEN (Open Access Publishing in European Networks)
2024
DOAB Directory of Open Access Books
2024
DOAB Directory of Open Access Books
2014
OAPEN (Open Access Publishing in European Networks)
2025
DOAB Directory of Open Access Books
2025
Springer Nature Link eBooks - Fully Open Access
2025
EBSCO Open Access Journals
2005-01-01 ~ 2024-12-31
DOAB Directory of Open Access Books
2015
Books at JSTOR: Open Access
2015
EBSCO Open Access Journals
2022-01-01 ~ 현재
EBSCO Open Access Journals
1976-01-01 ~ 2008-12-31
DOAB Directory of Open Access Books
2023
Cambridge Open Access Books and Elements
2023