edited by Margaret Carlyle
Oxford University Press, 1952
Buku Teks
Suranta Abd. Rahman
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2003
UI - Tesis (Membership)
Budd, Thomas A.
Alexander Hamilton Institute, 1961
Buku Teks
Parker, R.H.
Penguin Books, 1972
Buku Teks
White, Gerald I.
John Wiley & Sons, 1994
Buku Teks