1
Stott, Trish
| Oxford University Press |
2004
2
Azar, Betty Schrampfer
| Prentice Hall Regents |
1989
5
Virginia Vogel Zanger
| Heinle & Heinle |
1993
7
keith S. Folse,April Muchmore-Vokoun,Elena Vestri
| Heinle cengage learning |
2010
8
Michael McCarthy,Felicity O'Dell
| Cambridge University Press |
2009
9
Raymond Murphy
| Cambridge University Press |
2006
10
Raymond Murphy
| Cambridge University Press |
2009