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Buku Teks
Iwan Jaya Azis, 1953-, author
Oxford University Press, 1989
Buku Teks
edited by Chris Cooper and Stephen Wanhill
John Wiley & Sons, 1997
Buku Teks
Artikel Jurnal
edited by Gove Hambidge ; foreword by Teodoro Moscosco, introd. by Paul G. Hoffman
Frederick A. Praeger, 1964
Buku Teks