APA (7th ed.) Citation

Potten, H. H., & Donaghue, H. H. (2000). Clockwise. Pre-intermediate: Teacher's resource pack. University Press.

Chicago Style (17th ed.) Citation

Potten, H. Heather, and H. Helen Donaghue. Clockwise. Pre-intermediate: Teacher's Resource Pack. Oxford: University Press, 2000.

MLA (8th ed.) Citation

Potten, H. Heather, and H. Helen Donaghue. Clockwise. Pre-intermediate: Teacher's Resource Pack. University Press, 2000.