Penguin Education, 1973
Buku Teks
Middlesex Penguin Books, 1971
Buku Teks
Stephen A.Ross
Mc Graw Hill, 2009
Buku Teks
by Arthur J. Keown, John D. Martin, J. William Petty, David F. Scott
Prentice-Hall, 2001
Buku Teks
Prentice Hall International, 1991
Buku Teks