Stuart, Kaz, author
Sage Publications, 2015
Buku Teks
Meyerson, Martin, author
McGraw-Hill , 1962
Buku Teks
Wiles, David, author
Cambridge University Press, 2011
Buku Teks
Routledge, 1999
Buku Teks
Kirst-Ashman, Karen Kay, author
Cengage, 2018
Buku Teks