Drury, Nevill, 1947-, author
Thames & Hudson, 2004
Buku Teks
Freden, Gustaf
University, 1927
Buku Teks
Sihombing, Jumsa Oktopa Randy Andy, author
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2011
UI - Skripsi (Open)
Alger, Horatio
Horaito Alger Association of Distinguished America, 1994
Buku Teks
edited by Lars Linsen, H. Hagen, Bernd Hamann
Springer, 2012
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