Buckland, W.W.
At The University Press, 1957
Buku Teks SO
Wenger, Leopold
Veritas press, 1940
Buku Teks SO
Mousourakis, George
Springer International Publishing, 2015
eBooks
Schulz, Fritz
Clarendon Press, 1956
Buku Teks
Muirhead, John Spencer
W. Hodge, 1947
Buku Teks SO