Baalen, Christine van
John Benjamins Pub. Co, 2012
Buku Teks
Wallace, Catherine
1992
Buku Teks
Wallace, Catherine
Oxford University Press, 1993
Buku Teks SO
Gardner, Richard K.
Oxford University Press, 2015
Buku Teks SO
Orange, Claudia
Allen & Unwin, 1987
Buku Teks SO