.

Springer

https://link.springer.com/

TIRF

https://www.tirfonline.org/resources/references/

Sciencedirect

https://www.sciencedirect.com/

University of South Australia

https://www.library.unisa.edu.au/

Taylor & Francis

https://www.tandfonline.com/

Wiley library

https://www.onlinelibrary.wiley.com/

Emerald

https://emeraldinsight.com/

SAGE

https://journals.sagepub.com/

OXFORD

https://academic.oup.com/journals/

Cambridge

https://www.cambridge.org/core

https://doaj.org/

https://iosrjournals.org/

https://scholar.google.co.id/