Vodopich, Darrell S., author
McGraw-Hill, 2008
Buku Teks
Mertens, Thomas R., author
Burgess, 1968
Buku Teks
Hehman, Robert F., author
Costomized Publishing Division, 1976
Buku Teks
Yarbrough, James D., author
Burgess Publishing, 1970
Buku Teks
Blumenfeld, Martin
Burgess, 1977
Buku Teks