Fifield, Russell H.
Praeger , 1963
Buku Teks
Henderson, William
The MIT Press, 1963
Buku Teks
Mason, Edward S.
Claremont College for the four associated colleges at Claremont, 1955
Buku Teks
edited by Rodolfo A. Bulatao, James A. Palmore, and Sandra E. Ward
Westview Press, 1989
Buku Teks
edited by Bruce Brown
Australian National University Press, 1971
Buku Teks