Marcy Rockman, Joe Flatman, editor
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eBooks
London : Routledge
Majalah, Jurnal, Buletin
edited by Yvonne Marshall
Routledge, 1997
Buku Teks
Jessup, Ronald, author
Macdonald, 1968
Buku Teks
Timothy Insoll
Routledge, 2001
Buku Teks