Nanney, J. Louis
Allyn and Bacon, 1980
Buku Teks SO
Nanney, J. Louis
Allyn and Bacon, 1980
Buku Teks
Kuechle, Richard T.
Wadsworth, 1984
Buku Teks SO
Dwyer, David
Brooks/Cole, 2000
Buku Teks
Frank C. Wilson, Scott L. Adamson, Trey Cox, Alan E.O'Briyan
Cengage learning, 2013
Buku Teks