Chaisson, Eric, author
Prentice-Hall, 1999
Buku Referensi
Baker, Robert H., author
D. Van Nostrand, 1964
Buku Teks
Morrison, David, author
Saunders College, 1990
Buku Teks
Chapman, Robert D., author
W.H. Freeman, 1978
Buku Teks
Shaffer, Rick, author
Gramercy Books, 1994
Buku Referensi