Banister, Peter, author
Open University Press, 1994
Buku Teks
by Peter Banister ... [et al.]
McGraw-Hill, 2011
Buku Teks
bt Peter Banister ... [and others]
Open University Press, 2006
Buku Teks
Helfert, Erich A., author
Erlangga, 1997
Buku Referensi
Strauss, Anselm L., author
Sage, 1990.
Buku Teks