Edwards, Jane, author
Conran Octopus, 1999
Buku Referensi
edited by Gardner Murphy, Lois B. Murphy
Basic Books, 1968
Buku Teks
Bure, Gilles De.
Paris Flammarion 2000,
Buku Referensi
University of Tokyo Press, 1969
Buku Teks
edited by Lai Ah Eng, Francis L. Collins and Brenda S.A. Yeoh
Institute of South East Asia Studies, 2013
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