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.
Precaución: Estas citas no son 100% exactas.