edited by Ralph B. Winn
Littlefield, Adams, 1963
Buku Teks
Reulet, Anibal Sanchez
University of Mexico Press, 1954
Buku Teks
John J. Stuhr, editor
Oxford University Press, 2000
Buku Teks
Smith, John E., author
Yayasan Sumber Agung , 1995
Buku Teks
Schneider, Herbert W., author
Columbia University Press, 1947
Buku Teks