Nelson-Jones, Richard, author
Sage Publications, 2004
Buku Teks
edited by Elizabeth Holloway, Michael Carroll
Sage, 1999
Buku Teks
Rao, S. Narayana, author
Tata McGraw-Hill, 1992
Buku Teks
Worden, J. William, author
Routledge, 1991
Buku Teks
Munro, E.A., author
Ghalia Indonesia, 1985
Buku Teks