Archer, John
Cambridge University Press, 2002
Buku Teks
Lips, Hilary M.
McGraw-Hill, 2008
Buku Teks
edited by Anne E. Beall, Robert J. Strenberg
Guilford Press, 1993
Buku Teks
Brannon, Linda
Pearson , 2008
Buku Teks
Canary, Daniel
Gilford Press, 1997
Buku Teks