Brenan, Gerald
Cambridge University Press, 1993
Buku Teks
Thomas, Hugh, author
Harper & Brothers, 1961
Buku Teks
Preston, Paul, author
Dorsey Press, 1986
Buku Teks
Payne, Stanley G., author
W.W. Norton, 1970
Buku Teks
Arango, E. Ramon
Westview Press, 1978
Buku Teks