Morris-Jones, W.H.
University of Pennsylvania press, 1957
Buku Teks
Baerwald, Hans H.
Cambridge University Press, 1974
Buku Teks
Gorringe, Hugo, author
Oxford University Press, 2017
eBooks
Anderson, Edward William
Baillière Tindall & Cassell, 1979
Buku Teks
Hutt, W. H.
Ohio University Press , 1974
Buku Teks