Service, Elman R. (Elman Rogers), 1915-1996
Prentice-Hall, 1966
Buku Teks
Williams, Greer
Alfred A. Knoff, 1959
Buku Teks
Attenborough, David
BBC Worldwide Limited, 2004
Multimedia
Cussler, Clive
Arrow Books, 2003
Buku Teks
Clark, Grahame, 1907-1995
McGraw-Hill, 1971
Buku Teks