index
1. Index Copernicus International
2. World Cat
4. Doi Crossref
6. Garuda
8. Neliti
9. ROAD
10. BASE
11. Moraref
12. Dimensions
13. ISJD
14. Scilit
15. Researchbib
16. Directory of Research Journal Index (DRJI)
18. Citefactor
19. Sinta 4