Jacobs, Hayes B., author
Writer`s Digest Books, 1968
Buku Teks
Hines, John
Elm Tree Books, 1987
Buku Teks
Berner, R. Thomas, author
Allyn and Bacon, 1992
Buku Teks
Block, Mervin, author
Sage, 2012
Buku Teks
Rich, Carole, author
Wadsworth and Cengage Learning, 2010
Buku Teks