Moriarty, Sandra E. (Sandra Ernst), author
Pearson, 2012
Buku Teks
Wells, William D., author
Prentice-Hall, 1988
Buku Teks
Daniel, Pope, author
Basic Books, 1983
Buku Teks
Scott, James D.
Prentice-Hall, 1953
Buku Teks
Felton, George, 1947-, author
Prentice-Hall, 1994
Buku Teks