Swales, John M., author
The University of Michigan Press, 2004
Buku Teks
Skott-Myhre, Kathleen
Sense, 2012
eBooks
Shabrina Meidy Aghnia, author
2017
UI - Skripsi (Membership)
Goldberg, Natalie, author
Mizan, 2005
Buku Teks
Lembaga Penelitian Universitas Indonesia, 1987
UI - Laporan Penelitian