Fruehling, Rosemary T., author
McGraw-Hill, 1987
Buku Teks
USA : Macmillan, 1996,
Buku Referensi
Kalthoff, Robert J.
Prentice-Hall, 1981
Buku Teks
Fuori, William M., author
Prentice-Hall, 1994
Buku Teks
Oliverio, Mary Ellen, 1926-, author
South Western Cengage Learning, 2013
Buku Teks