McDaniel, Carl
South Western Cengage Learning, 2013
Buku Teks
Armstrong, Gary (Gary M.)
Prentice-Hall, 2005
Buku Teks
Farbey, A.D.
Crest Publishing House, 2001
Buku Teks
Ryan, William T.
Richard D. Irwin, 1981
Buku Teks
Davis, Judy
Crest, 2001
Buku Teks