Said, Sanib
Oxford University Press, 1985
Buku Teks
Porritt, Vernon L.
Monash Asia Institute, 2004
Buku Teks
Lieke Kusumaida
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2007
UI - Skripsi (Membership)
Lin, Liangqi
Foreign Languages Press, 2006
Buku Teks
Joko Suwaryo
Graduate Program in Management and Business Bogor Agricultural University, 2015
Artikel Jurnal