Fondo de Cultura Economica, 1979
Buku Teks
Grayson, George W., author
Thomson, 2004
Buku Teks
Pick, James B., author
Westview , 1989
Buku Referensi
edited by James W. Wilkie, Michael C. Meyer and Edna Monzon de Wilkie
University of California Press, 1976
Buku Teks
Coe, Michael D., author
Thames & Hudson, 2006
Buku Teks