Cole, George F.
Brooks/Cole, 1986
Buku Teks
Davis, Frederick T
Cambridge University Press, 2019
eBooks
McNamara, Robert Hartmann
McGraw-Hill, 2009
Buku Teks
Wormer, Katherine Stuart van
Allyn and Bacon, 2000
Buku Teks
Adler, Freda
McGraw-Hill, 2007
Multimedia