Sayles, Leonard R., author
Harper & Row, 1971
Buku Teks
edited by Daniel A. DeSalvo and Jay Liebowitz
Prentice-Hall, 1990
Buku Teks
Anyon, G. Jay
N.Y. Holt, 1963
Buku Teks
Laker, Kenneth R., author
McGraw-Hill, 1994
Buku Teks
Fallon, L. Fleming, author
Jones & Bartlett Learning, 2013
Buku Teks