Bailey, Thomas Andrew, 1902-1983
Prentice-Hall, 1980
Buku Teks
Thistlethwaite, Frank
Cambridge University Press, 1955
Buku Teks
Brinkley, Alan
McGraw-Hill, 1997
Buku Referensi
D.C. Heath and Company, 1992
Buku Teks
Miller, Herman Phillip
John Wiley & Sons, 1955
Buku Teks