Simpson, Thomas D.
Prentice-Hall, 1987
Buku Teks
Fry, Maxwell J.
John Hopkins University Press, 1995
Buku Teks
by H.G. Johnson... [and others]
Macmillan, 1968
Buku Teks
Stanford, Jon D.
John Wiley and Sons Australasia Pty , 1973
Buku Teks
Steiner, William Howard
Henry Holt, 1956
Buku Teks