Puri, Basant K., author
Churchill Livingstone, 2002
Buku Teks
Manel Esteller, editor
CRC Press, Taylor & Francis Group, 2009
Buku Teks
edited by Armand M. Nicholi
The Belknap Press of Harvard University Press, 1999
Buku Teks
Gelder, Michael, author
Oxford University Press, 1983
Buku Teks
Goldman, Howard H., author
Prentice-Hall, 1995
Buku Teks