Roberts, Charles E.
Prentice-Hall, 1979
Buku Teks
Tierney, John A.
Allyn and Bacon, 1979
Buku Teks
Boyce, William E., author
John Wiley & Sons, 1977
Buku Teks
Boyce, William E., author
John Wiley & Sons, 1992
Buku Teks
Wilcox, L. R. (Lee Roy), 1912-, author
International Textbook, 1962
Buku Teks