ScienceDirect
1993
DOAB Directory of Open Access Books
2021
OAPEN (Open Access Publishing in European Networks)
2025
DOAB Directory of Open Access Books
2025
Books at JSTOR: Open Access
2025
De Gruyter Brill Open Access eBooks
2025
Taylor & Francis eBooks (Open Access)
2025
OAPEN (Open Access Publishing in European Networks)
2026
DOAB Directory of Open Access Books
2026
Books at JSTOR: Open Access
2026
Project Muse Open Access ebooks
2026
De Gruyter Brill Open Access eBooks
2023
DOAB Directory of Open Access Books
2023
Books at JSTOR: Open Access
2023
Project Muse Open Access ebooks
2023
OAPEN (Open Access Publishing in European Networks)
2024
DOAB Directory of Open Access Books
2024
De Gruyter Brill Open Access eBooks
2024
DOAJ: Directory of Open Access Journals
2015-01-01 ~ 현재
Project Muse Open Access ebooks
2022
DOAB Directory of Open Access Books
2020