Artikel Jurnal
Unggul Widiyo Saputro, author
Program Pascasarjana Universitas Indonesia, 2005
UI - Tesis (Membership)
Tritana Gondhoyoewono, author
1991
UI - Tesis (Membership)
Hahn,Milton E.
McGraw-Hill Book Co., 1955
Buku Teks
Neukrug, Edward S., author
Brooks/Cole Cengage Learning, 2012
Buku Teks