1. Google Scholar

2. Directory of Open Acces Journal (DOAJ)

3. Directory of Abstract Indexing for Jounals (DAIJ)

4. Directory of Open Acces Scholarly Resources (ROAD)

5. Indonesian Scientific Journal Database (ISJD)

6. Mendeley

7. ISSUU

8. Biefeld Academic Search Engine (BASE)

9. Moraref

10. Scientific Indexing Service (SIS)

11. AcademicKeys

12.  Open Archives (OA)

13. Cosmos

14. Academic Resource Index (ARI)

15. Eurasian Scientific Journal Index (ESJI)

16. CiteUlike

17. Indonesia One Search

18. JournalTocs

19. Cite Factor

20. Directory Resource Journal Indexi (DRJI)

21. International Scientific Indexing (ISI)

22. Jifactor (JIF)

23. Harvard Library 

24. OCLC WorldCat

25. University of Oxford

26. Western Theological Seminary

27. Florida Institute of Technology

28. Universiteit Leiden