Wolfe, Gerard R.
McGraw-Hill, 1994
Buku Referensi
Appleton, Julian J.
Practicing Law Institute, 1947
Buku Teks
Rosenfeld, Paul E. [Paul Edward], 1969-
University of Illinois, 1961
Buku Teks
Rutherfurd, Edward
Ballantine Books Trade Paperbacks, 2010
Buku Teks SO
Whida Rositama
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2014
UI - Tesis Membership