Ismail Marahimin
Louisiana State University Press, 1986
Buku Teks
Kintner, William R
Henry Regnery Comapany, 1962
Buku Teks
Vestianty Nurlestari Ningrat
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2015
UI - Skripsi (Membership)
Bryan, J.
McGraw-Hill Book Company, Inc., 1960
Buku Teks
edited by H. Aram Veeser
Routledge, 1996
Buku Teks