Westview Press, 1980
Buku Teks
Hogbin, Geoff
McGraw-Hill, 1994
Buku Teks
edited by Hermann Brandstatter
Academic Press, 1982
Buku Teks
Radford, K.J., author
Phoenix Press, 1981
Buku Teks
Melman, Seymour, author
Oxford, Basil Blacwell & Mott
Buku Teks