Rutan, J. Scott
The Guilford Press, 2007
Buku Teks
Levine, Baruch
Prentince Hall, 1979
Buku Teks
Kaplan, Harold I.
Williams & Wilklins , 1993
Buku Teks
Ettin, Mark F.
Allyn and Bacon, 1992
Buku Teks
Roberts, David L., 1973-
Oxford University Press, 2016
Buku Teks