Tomasic, Roman, author
The Law Foundation of New South Wales and George Allen & Unwin, 1978
Buku Teks
Delgado-Gaitan, Concha
Rowman ,
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Wilson, P. R., author
University of Queensland, 1973
Buku Teks
Etzioni, Amitai, author
A Touchestone Book, 1994
Buku Teks
Ife, Jim, 1946-, author
Longman,1995, 0
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