Ellis, Donald
Lawrence Erlbaum Asssociates, Publish., 1999
Buku Teks
Holmes, David, author
Sage, 2005
Buku Teks
Griffin, E.M., author
Mc Graw Hill, 2003
Buku Teks
Griffin, E.M., author
McGraw-Hill, 2012
Buku Teks
Sereno, Kenneth K., author
Harper & Row, 1970
Buku Teks