Qureshi, Asif Hasan
Sweet & Maxwell/Thomson Reuters, 2011
Buku Teks SO
Attard, David Joseph
Clarendon Press, 1987
Buku Teks SO
Kohona, Palitha T.B.
Martinus Nijhoff, 1985
Buku Teks
Cambridge University Press, 2016
eBooks
Cambridge University Press , 2012
Buku Teks SO