Trescott, Paul B.
McGraw-Hill , 1965
Buku Teks
Simpson, Thomas D., author
Prentice-Hall, 1987
Buku Teks
by H.G. Johnson... [and others]
Macmillan, 1968
Buku Teks
Fry, Maxwell J.
The John Hopkins University Press , 1995
Buku Teks
Stanford, Jon D.
John Wiley and Sons Australasia Pty , 1973
Buku Teks