Middlesex Penguin Books, 1971
Buku Teks
International Texbook , 1970
Buku Teks
Stephen A.Ross
Mc Graw Hill, 2009
Buku Teks
Lorenz, Christopher
Gramedia, 2000
Buku Teks
by Arthur J. Keown, John D. Martin, J. William Petty, David F. Scott
Prentice-Hall, 2001
Buku Teks