Skipper, Mark. ( w 2 rekordach )

1. Karlsruher Virtueller Katalog - COPAC
2. Kp. Advanced grammar & vocabulary / Mark Skipper. - Newbury, Berkshire, 2002.

1. Skipper, Mark.

1. Advanced grammar & vocabulary : student's book / Skipper, Mark.
2. Advanced grammar & vocabulary : teacher's book / Skipper, Mark.