editor, Rudolf Schlesinger
Roudledge and Kegan Publishers, 1949
Buku Teks
New York Graphic Society, 1958
Buku Referensi
Shteppa, Konstantin F.
Rutgers University Press, 1962
Buku Teks
edited by R.R. Milner-Gulland
Pergamon Press, 1964
Buku Teks
Lensen, George Alexander
Sophia University, 1970
Buku Teks