Quinn, Virginia Nichols, author
McGraw-Hill, 1995
Buku Teks
Feldman, Robert S., author
McGraw-Hill, 1989
Buku Teks
Strongman, Kenneth T., author
John Wiley & Sons, 2006
Buku Teks
Bass, Bernard M., author
Allyn and Bacon, 1979
Buku Teks
Nicolson, Paula, author
MacMillan Education, 1986
Buku Teks