Donna L. Gruol, Noriyuki Koibuchi, Mario Manto, Marco Molinari, Jeremy D. Schmahmann, Ying Shen, editors
Springer International Publishing, 2016
eBooks
Muir, Bernice L., author
John Wiley & Sons, 1983
Buku Teks
Cambridge University Press, 2014
Buku Teks
Swales, John M.
The University of Michigan Press, 1994
Buku Teks
Nussbaum, Robert L., author
Elsevier , 2016
Buku Teks