Jones, Frank H.
W. Heffer & Sons, 1968
Buku Teks SO
Lahsasna, Ahcene
CERT publications, 2012
Buku Teks
Engku Rabiah Adawiah Engku Ali
Cert Publication, 2010
Buku Teks
edited by Avraham Oplatka and Miriam Balaban
Academic Press, 1983
Buku Teks SO
Rahail Ali, editor
Global Law and Business, 2011
Buku Teks SO