Routledge, 1996
Buku Teks
edited by Richard Robison and David S.G. Goodman
Routledge, 1996
Buku Teks
edited by John F. Kantner, Lee McCaffrey
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Buku Referensi
ESCAP , {s.a}
Majalah, Jurnal, Buletin
Deane E. Neubauer, editor
Routledge, 2012
Buku Teks