Brzenzunski, Zbigniew
Greenwood Press, 1970
Buku Teks SO
Martin, Dick
American Management Association, 2007
eBooks
Henni Oktaviani
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 1999
UI - Skripsi Membership
Modelski, George
Frederick A. Praeger, 1962
Buku Teks SO
Talbot, Phillips
Harper and Brothers, 1958
Buku Teks SO