Oshima, Alice
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
SAGE, 2005
Buku Teks
Jordan, R. R.
Longman, 2001
Buku Teks