Mueller, Conrad G.
Time Incoporated, 1966
Buku Teks
Sobel, Michael I., author
University of Chicago, 1987
Buku Teks
Supriyanto, author
Universitas Indonesia, 1992
UI - Tesis (Membership)
Entwistle, Jill, author
New York Roto vision SA 1999,
Buku Referensi
Adi Rahwanto, author
1990
UI - Tesis (Membership)