Bailey, Edward P., author
Prentice-Hall, 2002
Buku Teks
Netzley, Michael, author
Prentice-Hall, 2001
Buku Teks
May, Claire B., author
Upper saddle river, 2009
Buku Teks
Murphy, Herta A., author
McGraw-Hill, 1991
Buku Teks
Bromage, Mary C., author
McGraw-Hill, 1979
Buku Teks