Brekhus, Wayne.
MA Polity Press, 2015
Buku Teks
McShane, Steven Lattimore, author
McGraw-Hill, 2008
Buku Teks
Rayes, Ammar, author
Springer Nature, 2019
eBooks
Laybourn, Ann
Edinburgh HMSD , 1994
Buku Teks
edited by Ruth M. Kempson
Cambridge University Press , 1990
Buku Teks