Saywell, John T.
University of Toronto Press, 1977
Buku Teks
Fraser, Graham
Macmillan of Canada, 1984
Buku Teks
Saywell, John J.
University of Toronto Press , 1957
Buku Teks
Stipp, John L.
John Wley, 1967
Buku Teks
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 1989
UI - Skripsi (Membership)