Sethi, S. Prakash
Goodyear, 1973
Buku Teks
Kluwer Law and Taxation Publishers, 1983
Buku Teks
edited by Christopher Bright
Oxford University Press, 1994
Buku Teks SO
Nellen, Annette
Prentice-Hall, 1999
Buku Teks
Drew, John
Butterworth, 1983
Buku Teks