editor, Benny YP Siahaan
KJRI New York, 2016
Buku Teks
Whida Rositama
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2014
UI - Tesis Membership
Greenberg, Stanley, 1956-
The Johns Hopkins University Press, 1998
Buku Teks
Rutherfurd, Edward
Ballantine Books Trade Paperbacks, 2010
Buku Teks
Wolfe, Gerard R.
McGraw-Hill, 1994
Buku Referensi