Shockley, James E., author
Holt, Rinehart and Winston , 1976
Buku Teks
edited by Douglas M. Campbell and John C. Higgins
Wadsworh, 1984
Buku Teks
Wright, D. Franklin, author
D.C. Health, 1990
Buku Teks
Strang, Gilbert, author
Wellesley Cambridge Press, 1986
Buku Referensi
Keedy, Mervin J., author
Addison-Wesley , 1969
Buku Teks