Gaya APA

Watcyn-Jones, P., Deirdre, I, H. (2002). Pair work 1: elementary-pre-intermediate . London: London: Penguin English, 2002.

Gaya MLA

Watcyn-Jones, Peter., Deirdre, I., Howard-Williams,. "Pair work 1: elementary-pre-intermediate". London: London: Penguin English, 2002, 2002. .