Mouly, George G.
Holt, Rinehart and Winston, Inc., 1968
Buku Teks
Stephen N. Elliot [and others]
McGraw-Hill, 2000
Buku Teks
Stephen N. Elliot, Thomas R. Kratochwill, Joan Littlefield Cook, John F. Travers, authors
McGraw-Hill Book , 2000
Buku Teks
Sullivan, Peter, 1948-
Springer, 2013
Buku Teks SO
James A. Coleman; John Klapper
Routledge, 2005
Buku Teks SO