ScienceDirect
Springer
Scopus
Taylor & Francis
Jstor
ProQuest
Wiley Online
ISI Web of Knowledge
EBSCOHOST
ScienceDirect Journals: 2600
ScienceDirect eBooks: 16
Springer Journals: 2271
Springer eBooks: 52189
ProQuest: 12 databases
Taylor & Francis: 693,372