Livoti, Carol, author
American Management Association, 2009
eBooks
Murray, Michael T.
CA Prima, 1995
Buku Teks
Abdul Bari Saifuddin, author
UI-Press, 1992
UI - Pidato
Dunbar, Helen Flanders
Random House, 1947
Buku Teks
Erna Sofiah, author
Program Pascasarjana Universitas Indonesia, 2003
UI - Tesis (Membership)