Lunt, Peter Kenneth, 1956-, author
Sage, 2012
Buku Teks
Cairncross, Liz, author
Routlege, 1997
Buku Teks
Rothenberg, Lawrence S., author
Cambridge University Press, 1992
Buku Teks
Pring, Martin J., author
McGraw-Hill, 1980
Buku Teks
Arnould, Eric J., author
McGraw-Hill, 2002
Buku Teks