Mari Okamoto
Graduate School of Language and Culture, Osaka University, 2019
Artikel Jurnal
Eszter, Simon
Springer, 2012
eBooks
Kenner, Cornelia V. (Cornelia Vanderstaay)
Little, Brown & Co., 1985
Buku Teks
Leny Nurahmi
2011
UI - Laporan Penelitian
Rina Merryliana
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2009
UI - Tesis (Open)