Black, Geoff, author
Prentice-Hall, 2002
Buku Referensi
Leal, A. R.
Longman, 1979
Buku Teks
Association for investment Management Research, 1996
Buku Teks
Black, Geoff
London : Prentice Hall, 2001,
Buku Referensi
Stevens, P., author
Macmillan, 1990
Buku Teks