Schiffrin, Deborah
Blackwell , 2000
Buku Teks
edited Philip Bean, Sewart MacPherson
Routledge and Kegan Paul, 1983
Buku Teks
Tame, Jeremy R. H.
Springer Singapore, 2019
eBooks
Glassman, William E.
Open University Press, 2004
Buku Teks
Shrodes, Caroline
Macmillan, 1967
Buku Teks