Jones, W Glyn
Twayne Publisher, 1969
Buku Teks
Jones, Byron W.
John Wiley & Sons, 1982
Buku Teks
Morris-Jones, W.H.
University of Pennsylvania press, 1957
Buku Teks
Oxford University Press, 1991
Buku Teks
Jones, Givin W.
Canberra Austrralian National University Press 1082,
Buku Teks