1. ACM Digital Library

2. EBSCOhost Business Source Complete

3. Emerald

4. IEEE/IET Electronic Library (IEL) via IEEE Xplore® Digital Library

5. Lexis Advance

6. IOPScience

7. Passport

8. ProQuest Central

9. ProQuest Ebook Central

10. PsycARTICLES

11. ScienceDirect Freedom Collection via ScienceDirect

12. Scopus

13. Springer Journal Collection via SpringerLink

14. Cengage Learning eTextbooks

15. Wiley eTextbooks

16. McGraw-Hill eTextbooks

17. JSTOR Mathematics & Statistics Collection

18. Statista