Ayres, Joe
WCB/McGraw-Hill, 1994
Buku Teks
Gamble, Teri Kwal, author
Allyn and Bacon, 1994
Buku Teks
Devito, Joseph A., author
Harper and Row, 1984
Buku Teks
Floyd, Kory, author
McGraw-Hill, 2015
Buku Teks
Payne, James, author
Illinois National Textbook, 1994
Buku Teks