Poggi, Gianfranco
Stanford Universrity Press, 1978
Buku Teks
New York University Press, 1951
Buku Teks
Palmer, R.R. (Robert Roswell), 1909-2002, author
Princeton University Press, 1964
Buku Teks
Hayes, Carlton J. H., author
Macmillan, 1932
Buku Teks
Yoga Soegomo
Pustaka Kartini, 1986
Buku Teks