The rethorical style of indonesian research article introductions: a genre analysis study Safnil
 Artikel Jurnal
Carr, Reg
The academic research library in a decade of change
Chandos, 2007
 Buku Teks
Research perspectives on english for academic purposes
John Flowerdew, Matthew Peacock
Cambridge University Press, 2001
 Buku Teks
Directory of research in academic year 1996-97
National University of Singapore, [date of publication not identified]
 Buku Referensi
Directory of research in academic year 1995-96
National University of Singapore, [date of publication not identified]
 Buku Referensi