Art Address Verlag Muller GMBH , 1982
Buku Referensi
Hacher, Robert A., author
Printed Matter, 1989
Buku Teks
Morgan, Gareth, 1943-, author
SAGE Publications, Inc, 2006
Buku Teks
editor in chief, Sybil P. Parker
McGraw-Hill, 1997
Buku Referensi
New York Funk and Wagnalls 1958
Buku Referensi