Huang, Francis F.
Macmillan, 1976
Buku Teks
Wood, Bernard D.
Addison-Wesley, 1982
Buku Teks
Balzhiser, Richard E.
Prentice Hall of India, 1977
Buku Teks
Haberman, William L., 1922-
Boston: Allyn and Bacon, 1980
Buku Teks
Myers, Glen E.
Prentice-Hall, 1989
Buku Teks