★ InfoBase Index

★ Universe Digital Library Sdn Bhd (UDLSB), Malaysia

★ China National Knowledge Infrastructure (CNKI), China

★ Chinese Database of CEPS, American Federal Computer Library Center (OCLC), USA

★ Google scholar

★ Electronic Journals Library
★ Academic Keys
★ Cite Factor (USA)
★ get CITED
★ Scientific Indexing Services
★ INNO SPACE
★ S Journals