Engelsohn, Harold S.
McGraw-Hill, 1981
Buku Teks
Nanney, J. Louis, author
Allyn and Bacon, 1980
Buku Teks
Nanney, J. Louis, author
Allyn and Bacon, 1980
Buku Teks
Kuechle, Richard T., author
Wadsworth, 1984
Buku Teks
Dwyer, David, author
Brooks/Cole, 2000
Buku Teks