Pritchard, John
Viking, 1992
Buku Teks
Ople, Blas F. author
Institute for Public Policy, 2001
Buku Teks
Hawgood, John A., author
Nicholson and Watson, 1947
Buku Teks
Hermawan Kartajaya, 1947-, author
Gramedia Pustaka Utama, 2017
Buku Teks
Situmorang, Ben Ronald P., author
Universitas Indonesia, 2013
UI - Tesis (Membership)