Ully Damari Putri, author
Program Pascasarjana Universitas Indonesia, 2006
UI - Tesis (Membership)
editor by. James A. Maxwell
The Reader's Digest Association Inc., 1984
Buku Referensi
Mortimer J. Adler, editor in chief
Encyclopedia Britanica, 1994
Buku Referensi
Cheeseman, G.W.H., author
John Wiley & Sons, 1979
Buku Teks
Carlsen, G. Robert
Harper & Row, 1971
Buku Referensi