Kornblum, William, author
Harcourt Brace College Publishers, 1997
Buku Teks
Bryjak, George J
Allyn and Bacon, 1994
Buku Teks
Mclnerney, Claire R.
Springer, 2007
Buku Teks
Greene, John C.
A Mentor Book, 1963
Buku Teks
Scott Frickel; Kelly Moore, editor
University of Wisconsin Press , 2006
Buku Teks