Stern, Mark E.
McGraw-Hill, 1966
Buku Teks
Randall, Geoffrey, author
Crest Publishing House, 2001
Buku Teks
Farbey, A.D., author
Crest Publishing House, 2001
Buku Teks
Morse, Stephen A., author
Crest Publishing House, 2001
Buku Teks
Barban, Arnold N.
NTC Business Books, 1993
Buku Teks