Postlethwait, John H., author
Brooks/Cole, Thomson Learning, 2003
Buku Teks
Keosian,John
Reinhold Publishing Corporation, 1964
Buku Teks
Branley, Franklyn M.
Ginn and Company, 1965
Buku Teks
Belk, Collen
Pearson - Benjamin Cummings, 2008
Buku Teks
Presson, Joelle, author
McGraw-Hill, 2008
Buku Teks