Stein, Barbara L., author
Neal-Schuman, 1992
Buku Referensi
Univ. of Tennessee
The health and safety dept., 1973
Buku Teks
Yin, Qian
Design Media, 2010
Buku Referensi
Eravianti, author
Universitas Indonesia, 2006
UI - Tesis (Membership)
University of Harvard
University of Harvard, 1973
Buku Teks