Kuh, Edwin, author
North-Holland Publishing, 1973
Buku Teks
Fischer, Stanley, author
McGraw-Hill, 1988
Buku Teks
by edited by David F. Heathfield
Macmillan, 1976
Buku Teks
McEachern, William A., author
South-Western College Publishing, 2000
Buku Teks
McEachern, William A., author
South-Western College Publishing, 1997
Buku Teks