Watcyn-Jones P. Peter & Allsop J. Jake. (2005). Test Your Prepositions. Edinburgh, Penguin English, 2005.
Cita Chicago (17th ed.)Watcyn-Jones P. Peter i Allsop J. Jake. Test Your Prepositions. Edinburgh, Penguin English, 2005, 2005.
Cita MLA (9th ed.)Watcyn-Jones P. Peter i Allsop J. Jake. Test Your Prepositions. Edinburgh, Penguin English, 2005, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.