Brode, John
Harvard University Press, 1969
Buku Referensi
edited by E.K. Fisk
Australia National University, 1966
Buku Teks
Stanfort University Press, 1964
Buku Teks
edited by George Dalton
New York, 1971
Buku Teks
Solidaridad Publishing House, 1969
Buku Teks