Tempest, P.J., author
Pergamon Press, 1981
Buku Teks
Oades, Lindsay G., author
Sage, 2019
Buku Teks
edited by Janet Holmes and Kirk Hazen
John Wiley & Sons, 2014
Buku Teks
Underwood, James R., author
Wiley, 2007
Buku Teks
Frank, Marcella, author
Prentice-Hall, 1972
Buku Teks