Leger, Daniel W.
HarperCollins Publishers, 1992
Buku Teks
Young, Dona J., author
McGraw-Hill, 2006
Buku Teks
Barlow, David H., author
Brooks/Cole, 1995
Buku Teks
Barlow, David H., author
Thomson , 2005
Buku Teks
Barlow, David H., author
Wadsworth and Cengage Learning, 2012
Buku Teks