Dana, Forest C.
New York: McGraw-Hill, 1958
Buku Teks
Butler, Robert Brown, author
McGraw-Hill, 1984
Buku Referensi
Stroud, K. A.
Erlangga, 2001
Multimedia
Theraja, B.L., author
S. Chand, 1982
Buku Teks
Vierck, Charles J., author
McGraw-Hill, 1978
Buku Teks