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Buku Teks
Longman, 1992
Buku Teks
Chris Asanti, author
Fakultas Ilmu Budaya Universitas Mulawarman, 2017
Artikel Jurnal
Maulida Kurniasari, author
2016
UI - Tesis (Membership)
Michael Frederick Hofmeyr, author
Graduate School of Language and Culture, Osaka University, 2018
Artikel Jurnal