Hernandez-Campoy, Juan Manuel
Wiley Blackwell, 2016
Buku Teks SO
Rogers, Everett M.
The Free Press, 1994
Buku Teks SO
Rogers, Everett M.
Free Press, 1994
Buku Teks SO
Tagliamonte, Sali A
Cambridge University Press , 2006
Buku Teks
Schilling, Natalie
Cambridge University Press, 2013
Buku Teks