APA-referens (7:e uppl.)
ebrary, Inc, Powell, S., & Green, H. (2007). The doctorate worldwide. Society for Research into Higher Education & Open University Press.
Chicago-referens (17:e uppl.)
ebrary, Inc, Stuart Powell, och Howard Green. The Doctorate Worldwide. Maidenhead: Society for Research into Higher Education & Open University Press, 2007.
MLA-referens (9:e uppl.)
ebrary, Inc, et al. The Doctorate Worldwide. Society for Research into Higher Education & Open University Press, 2007.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.