Illinois, 1983
Buku Teks
Suprapti Sumarmo Markam, author
UI Press, 2003
Buku Teks
Nietzel, Michael T., author
Prentice-Hall, 1998
Buku Teks
Trull, Timothy J., 1960-, author
Thomson , 2005
Buku Teks
Sarafino, Edward P., author
John Wiley & Sons, 1994
Buku Teks