Marsh, William M., author
John Wiley & Sons, 2005
Buku Teks
Marsh, William M., author
John Wiley & Sons, 1998
Buku Teks
Murnane, Gerald, author
Penguin Books, 1987
Buku Teks
Design Media Publishing Limited
Design Media Publishing Limited, 2010
Buku Teks
BooQs publisher data, 2010
Buku Referensi