Chance, Don M.
South-Western Cengage Learning, 2013
Buku Teks
Ayoub, Sherif
Edinburgh University Press, 2014
Buku Teks
edited by Niklas Wagner
CRC Press, Taylor & Francis Group, 2008
Buku Teks
Mangiero, Susan M.
John Wiley & Sons, 2005
Buku Teks
Dorfman, Mark S.
Prentice-Hall, 1998
Buku Teks