Perrin, Porter G., author
Scott, Foresman, 1950
Buku Teks
Writer's Digest Bokks, 1994
Buku Teks
Schumacher, Michael, author
Writer's Digest Books, 1990
Buku Teks
VanderMey, Randal, author
Wadsworth and Cengage Learning, 2012
Buku Teks
Connelly, Mark, author
Wadsworth and Cengage Learning, 2013
Buku Teks