Arya, Jagdish C., author
Prentice-Hall, 1983
Buku Teks
Nanney, J. Louis, author
Allyn and Bacon, 1980
Buku Teks
Kuechle, Richard T., author
Wadsworth, 1984
Buku Teks
Gager, William A., author
Macmillan, 1968
Buku Teks
Barnett, Raymond A., author
McGraw-Hill, 2001
Buku Teks