★ Database of EBSCO, Massachusetts, USA
★ Index Copernicus, Poland
★ CiteFactor, USA
★ Google Scholar
★ American Chemical Society (ACS), USA
★ Turkish Education Index
★ J-GATE database, India
★ CSA Technology Research Database
★ Ulrich’s Periodicals Directory
★ Electronic Journals Library (EZB)
★ Public Affairs Information Service
★ Norwegian Social Science Data Services (NSD), Database for Statistics on Higher Education (DBH), Norway
★ Universe Digital Library S/B, Proquest
★ Summon Serials Solutions
★ SHERPA/RoME
★ Polish Scholarly Bibliography
★ NewJour, USA
★ Berlin Social Science Center
★ Chinese Electronic Periodicals Service, Airiti Inc, Taiwan
★ Online Computer Library Center, Inc., USA
★ Chinese Scientific Journals Database, VIP Corporation, Chongqing, P. R. China