DOAB Directory of Open Access Books
1990
DOAB Directory of Open Access Books
2022
DOAB Directory of Open Access Books
2021
EBSCO Open Access Journals
2014-01-01 ~ 현재
ScienceDirect
2008
DOAB Directory of Open Access Books
2015
OAPEN (Open Access Publishing in European Networks)
2021
DOAB Directory of Open Access Books
2021
Taylor & Francis eBooks (Open Access)
2020
OAPEN (Open Access Publishing in European Networks)
2019
DOAB Directory of Open Access Books
2019
Springer Nature Link eBooks - Fully Open Access
2019
ScienceDirect
2022
OAPEN (Open Access Publishing in European Networks)
2021