Attenborough, David
BBC Worldwide Limited, 2004
Multimedia
Mader, Sylvia S., author
McGraw-Hill, Higher Education, 2006
Buku Teks
Haslam, Sara, author
Routledge, 2009
Buku Teks
Grobstein, Clifford, author
W.H. Freeman, 1965
Buku Teks
Koob, Derry D., author
Addison-Wesley, 1971
Buku Teks