Guruswamy, Lakshman D., author
Thomson/West, 2012
Buku Teks
Findley, Roger W., author
West Publishing, 1983
Buku Teks
edited by W. Lang, H. Neuhold,K. Zemanek
Graham & Trotman / Martinus Nijhoff, 1995
Buku Referensi
Findley, Roger W., author
West Publishing, 1992
Buku Teks
Findley, Roger W., author
West Publishing, 1996
Buku Teks