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[publisher not identified], [date of publication not identified]
Buku Teks
Hazen, Kirk, author
Massachusetts : Wiley Blackwell, 2015
Buku Teks
Hughes, John P., author
Random House, 1966
Buku Teks
Can Bahadir Yuce, author
OMNES, 2019
Artikel Jurnal
Nerlich, Brigitte, author
Routledge, 1990
Buku Teks