edited by George Dalton
New York, 1971
Buku Teks
edited by E.K. Fisk
Australia National University, 1966
Buku Teks
Godwin, C. J.
Tata McGraw-Hill, 1972
Buku Teks
Brode, John
Harvard University Press, 1969
Buku Referensi
Martin, Brian, author
Freedom Press, 1993
Buku Teks