Cita APA (7th ed.)
Ashworth, J., & Clak, J. (1997). I-SPY: Teacher's book 1. University Press.
Cita Chicago (17th ed.)
Ashworth, Julie, i John Clak. I-SPY: Teacher's Book 1. Oxford: University Press, 1997.
Cita MLA (9th ed.)
Ashworth, Julie, i John Clak. I-SPY: Teacher's Book 1. University Press, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.