Allsop, J. (1990). Cassell's students' English grammar exercises with answers (Repr. with amendments.). Cassell.
Chicago-Zitierstil (17. Ausg.)Allsop, Jake. Cassell's Students' English Grammar Exercises with Answers. Repr. with amendments. London: Cassell, 1990.
MLA-Zitierstil (9. Ausg.)Allsop, Jake. Cassell's Students' English Grammar Exercises with Answers. Repr. with amendments. Cassell, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.