Pollard, Thomas D., author
Saunders Elsevier, 2008
Buku Teks
Karp, Gerald, author
John Wiley & Sons Inc, 2010
Buku Teks
Wolfe, Stephen L., author
Wadsworth, 1983
Buku Teks
Smith, Chris A.
Chapman & Hall, 1993
Buku Teks
Dyson, Robert D.
Allyn and Bacon, 1974
Buku Teks