Pochhacker, Franz, author
Routledge, 2004
Buku Teks
edited by Norman K. Denzin, Yvonna S. Lincoln
Sage, 1998
Buku Teks
edited by Susan M. Pearce
Routledge, 1996
Buku Teks
Gilbert, Joseph, author
Van Nostrand Reinhold, 1978
Buku Teks
Qureshi, Asif H. , author
Cambridge University Press, 2015
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