Balle, Michael
McGraw-Hill, 1994
Buku Teks
Griffin, Ricky W., author
Prentice-Hall, 2002
Buku Teks
Surma, Jerzy, author
Businessexpert Press, 2011
Buku Teks
Shubin, John A., author
Barnes & Noble, 1975
Buku Teks
Pride, William M., author
Hougton-Mifflin, 1988
Buku Teks