Beamer, Linda, author
McGraw-Hill, 2008
Buku Teks
Crable, Richard E.
Charles E. Merrill, 1976
Buku Teks
Fiske, John, author
Routledge, 1997
Buku Teks
Connolly, James E.
Burges Publishing, 1974
Buku Teks
Devito, Joseph A., author
Pearson Education, 2004
Buku Teks