Cita APA (7th ed.)
Ashworth, J., & Clark, J. (1997). I-SPY: Activity book 2. University Press.
Cita Chicago (17th ed.)
Ashworth, Julie, i John Clark. I-SPY: Activity Book 2. Oxford: University Press, 1997.
Cita MLA (9th ed.)
Ashworth, Julie, i John Clark. I-SPY: Activity Book 2. University Press, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.