Marsh, William M.
John Wiley & Sons, 1998
Buku Teks
Murnane, Gerald
Penguin Books, 1987
Buku Teks
Design Media Publishing Limited
Design Media Publishing Limited, 2010
Buku Teks
BooQs publisher data, 2010
Buku Referensi
Design Media Publishing Limited, 2010
Buku Referensi