Smidt, Sandra, author
Routledge, 2007
Buku Teks
Hubbard, L. Ron, 1911-1986, author
Bridge Publications, Inc., 2012
Buku Referensi
Sroufe, L. Alan, author
Cambridge University Press, 1996
Buku Teks
Ministry of Foreign Affairs, 1975
Buku Teks
Zilberstein, Anya, author
Oxford University Press, 2016
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