Stephen J. Wayne [et all.]
Thomson, 2005
Buku Teks
Davis, David Howard
Nelson-Hall Publishers, 1999
Buku Teks
edited by Edward Conrad Smith and Arnold John Zurcher
Barnes & Noble, 1966
Buku Teks
Bone, Hugh A.
McGraw-Hill, 1965
Buku Teks
McCarthy, Eugene J., 1916-2005
Macmillan, 1962
Buku Teks