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
Madura, Jeff
Thomson South-Western, 2003
Buku Teks
Prentice Hall International, 1991
Buku Teks