Oshima, Alice, author
Longman, 1997
Buku Teks
Oshima, Alice, author
Pearson Longman, 2006
Buku Teks
Swales, John M.
The University of Michigan Press, 1994
Buku Teks
editors, Junaidi, Elda N. Auliansani, Farah S. Azizah, M. Umar Sadikin
UI Publishing, 2020
Buku Teks
Craswell, Gail, author
SAGE, 2005
Buku Teks