Design Media Publishing Limited
Design Media Publishing Limited, 2010
Buku Teks
BooQs publisher data, 2010
Buku Referensi
Design Media Publishing Limited, 2010
Buku Referensi
edited by Steven Moorhead and Gordon Grice
Rockport Publisher, 1997
Buku Referensi
Austin, Richard L., author
Van Nostrand Reinhold, 1984
Buku Teks