Karen B. Brown, editor
[, Springer], 2012
eBooks
Mousourakis, George
Springer International Publishing, 2015
eBooks
Mehren, Arthur Taylor von
Little,Brown and Company, 1957
Buku Teks
Lawson, F.H.
Clarendon Press, 1955
Buku Teks
Abeyratne, Ruwantissa
Springer, 2012
eBooks