Campbell, Enid Mona
The Law Book, 1967
Buku Teks
Campbell, Enid Mona
[publisher not identified], [date of publication not identified]
Buku Teks
Trans Tech, 2011
Majalah, Jurnal, Buletin
edited by E.G. Stanford, J.H. Fearon, W.J. McGonnagle
CRC Press, 1968
Buku Teks
Hall, John W.
University of Michigan Press, 1954
Buku Teks