David W. Springer, Albert R. Roberts, editor
Jones and Bartlett Publishers, 2011
Buku Teks
Eldefonso, Edward
Glencoe Press, 1974
Buku Teks
Burfeind, James W. , author
Jones and Bartlett Publishers, 2011
Buku Teks
Arnold, William R.
Houghton Mifflin, 1983
Buku Teks
Feld, barry c., author
Thomson/West, 2009
Buku Teks