Malalasekera, G. P.
Luzac , 1960
Buku Referensi
Partridge, Eric, 1894-1979
Secker and Warburg, 1950
Buku Referensi
Artikel Jurnal
Heerwagen, Dean
McGraw-Hill Higher Education, 2004
Buku Teks
Faradilla Rispananda
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2017
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