Rodrigue, Jean-Paul, 1967-, author
Rotledge, 2013
Buku Teks
Richard Knowles, Jon Shaw, Iain Docherty, editor
BlackWell , 2008
Buku Teks
Taaffe, Edward J.
Prentice-Hall, 1996
Buku Teks
edited by Julie Cidell and David Prytherch
Routledge, 2015
Buku Teks
Getis, Arthur, author
McGraw-Hill Higher Education, 2009
Buku Teks