Eggert, Rudolph J., author
Pearson/Prentice Hall, 2005
Buku Teks
Sivarajan, V., author
V.K. Publisher, 1981
Buku Teks
edited by Douglas C. Greenwood
McGraw-Hill, 1959
Buku Referensi
Johnson, Ray C., author
John Wiley & Sons, 1980
Buku Teks
edited by Harold A. Rothbart
McGraw-Hill, 1996
Buku Referensi