1
Brumfit, Christopher.
| Oxford University Press |
1979
보존자료
2
Brumfit, Christopher.
| Oxford University Press |
1986
보존자료
4
Spolsky, Bernard
| Oxford University Press, |
1989
대출가능
5
Widdowson, H. G.
| Oxford University Press |
1990
보존자료
6
Weinstein, Arnold L
| Oxford University Press |
1993
보존자료