Phillips, O. Hood
Swett and Maxwell, 1973
Buku Teks
Phillips, O. Hood
Sweet & Maxwell, 1987
Buku Teks
Phillips, O. Hood, author
Sweet & Maxwell, 2001
Buku Teks
Carroll, Alex, 1947-, author
Pearson Longman, 2007
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De Smith, S.A. (Stanley A.), author
Penguin Books, 1994
Buku Teks