edited by Robert J. Hudson, K. R. Drew, L. M. Baskin ; section subeditors, David H. M. Cumming [and others]
Cambridge University Press, 1989
Buku Teks
Robert Cornraads and five outhers, author
Reader's Digest, 2015
Buku Referensi
Cubitt, Gerald, author
MIT Press, 1992
Buku Referensi
Wild, Ray
Holt, Rinehart and Winston , 1975
Buku Teks
Penguin, 1981
Buku Teks