Alexander, Daniel C., author
Brooks/Cole Cengage Learning, 2011
Buku Teks
Brixey, John C., author
Holt, Rinehart and winston, 1954
Buku Teks
Brixey, John C., author
Holt, Rinehart and winston, 1954
Buku Teks
Lane, Bennie R.
Prindle, Weber and Schmidt , 1973
Buku Teks
Nichols, Eugene D.
Rinehart Press, 1975
Buku Teks