Ray, James Lee, author
Houghton Mifflin, 1987
Buku Teks
Kaarbo, Juliet, author
Wadsworth, Cengage Learning, 2011
Buku Teks
edited by Yahya R. Kamalipour
Thomson, Wadsworth, 2007
Buku Teks
Organski, A.F.K., author
Alfred A. Knopf, 1969
Buku Teks
Rivoli, Pietra, author
John Wiley & Sons, 2005
Buku Teks