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David Mckay, [date of publication not identified]
Buku Referensi
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Lonely Planet Publications, 2006
Buku Referensi
Gisella Alisya, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2009
UI - Skripsi (Open)
Pushkarev, S. G. (Sergei Germanovich), 1888-1980, compiler
Yale University Press, 1970
Buku Referensi
Akademija nauk SSSR
Nauka, 1975
Buku Referensi