Leys, Wayne A.R.
Prentice-Hall, 1961
Buku Teks SO
Editor by David Lucas with Penny Kare
Australia National University , 1985
Buku Teks SO
Runciman, Lex
Allyn and Bacon, 1999
Buku Teks SO
Browne, M. Neil
Prentice-Hall, 2001
Buku Teks
Keyton, Joann
McGraw-Hill, 2015
Buku Teks SO