Blaisdell Pub., 1966
Buku Teks
edited by B. Wilshire, D.R.J. Owen
Pineridge Press, 1981
Buku Teks
Kohn, Caroline
Stuttgart JB Metzlersche 1966
Buku Teks
Kraus, Bertram S.
Harper & Row, 1964
Buku Teks
Groot, Gerard J.
Columbia University Press, 1951
Buku Teks