Cita APA (7a ed.)

Watcyn-Jones, P., & Allsop, J. (2001). Test your prepositions. Penguin English.

Cita Chicago Style (17a ed.)

Watcyn-Jones, Peter, y Jake Allsop. Test Your Prepositions. Harlow: Penguin English, 2001.

Cita MLA (9a ed.)

Watcyn-Jones, Peter, y Jake Allsop. Test Your Prepositions. Penguin English, 2001.