editor, John Prest
Oxford University Press, 1993
Buku Referensi
Brockliss, L. W. B., author
Oxford University Press, 2016
eBooks
Buxton, L.H. Dudley, author
The Clarendon Press, 1935
Buku Teks
Edited by William James
Anmol Publications PVT. LTD., 2005
Buku Teks
Narasimhan, Chakravarthi V., author
United Nations University, 1994
Buku Teks