edited by Arthur F. Kinney and Thomas Warren Hopper
Wiley/Balckwell, 2017
Buku Teks
Grant, Patrick
Macmillan Press, 1979
Buku Teks
Winston, Robert
BBC Worldwide Limited, 2004
Multimedia
Thibodeau, Gary A., 1938-2013
Elsevier, 2005
Buku Teks
Shambhala, 1999
Buku Referensi