Welagen, Robbert
Nijgh Van Ditmaar, 2013
Buku Teks
Ruven, Paul, author
Stone Hollywood Publishers, 2012
Buku Teks
Watson, C.W., author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2017
Artikel Jurnal
[publisher not identified], [date of publication not identified]
Naskah
[publisher not identified], [date of publication not identified]
Naskah