indexing
- Google Scholar
- Crossref
- Garuda (RistekDikti)
- Bielefeld Academic Search Engine (BASE)
- SINTA (Science Technology Index)
- Scilit
- WorldCat
- Semantic Scholar
- Scinapse
- Indonesia OneSearch
- Open AIRE/EXPLORE
- Lancaster University
- Berkelay Universtity Of California
- Index Copernicus International
Library Indexing
- Universiteit Leiden
- Harvard Library
- Georgetown University Library
- Boston University
- Fujairah Digital Library
