Adams, Katherine H.
Mayfield Publishing Company, 2000
Buku Teks
Robson, Andrew E.
McGraw-Hill, 1997
Buku Teks
Routledge, 2004
Buku Teks
edited by Ludo Verhoeven and Charles Perfetti
Cambridge University Press, 2017
Buku Teks
Aveling, Harry
Faculty of Humanities University of Indonesia, 2006
Artikel Jurnal