Watts, David Alistair
Graduate School of Language and Culture, Osaka University, 2019
Artikel Jurnal
Oshima, Alice
Pearson Longman, 2006
Buku Teks
Byrd, Patricia
Prentice-Hall, 1981
Buku Referensi
Swales, John M.
The University of Michigan Press, 1994
Buku Teks
Inayanti
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2019
UI - Tesis (Membership)