Armstrong, Russell M., author
John Wiley & Sons, 1973
Buku Teks
Davidson, Hilda Ellis
D.S. Brewer, 1978
Buku Teks
Davidson, Basil, author
Jonathan Cape, 1953
Buku Teks
Alladi, Krishnaswami, editor
[Springer, ], 2012
eBooks
Coon, Dennis, author
Wadsworth/Thomson Learning, 2006
Buku Teks