Rogg, S.G.
Charles C. Thomas, 1965
Buku Teks
Madell, Geoffrey
Edinburgh Univeristy Press, 2002
Buku Teks
edited by Michael D. Robinson, Edward R. Watkins, Eddie Harmon-Jones
Guilford Press, 2013
Buku Teks
Reeve, Johnmarshall, author
John Wiley & Sons, Inc., 2015
Buku Teks
Guilford Publications, 2014
Buku Teks