Wright, D. Franklin, author
D.C. Health, 1990
Buku Teks
Strang, Gilbert, author
Wellesley Cambridge Press, 1986
Buku Referensi
Washington, Allyn J., author
Pearson - Prentice Hall, 2009
Buku Teks
Keedy, Mervin J., author
Addison-Wesley , 1969
Buku Teks
Ewen, Dale, author
Thomson Brooks/Cole, 2007
Buku Teks