Reineeke, John A.
Allyn and Bacon, 1974
Buku Teks
Bearden, James H., author
Holt, Rinehart and Winston , 1969
Buku Teks
Jucius, Michael J., author
Richard D. Irwin, 1961
Buku Teks
Hastings, Paul G., author
McGraw-Hill, 1974
Buku Teks
Musselman, Vernon A., author
Prentice Hall of India, 1982
Buku Teks