Cita APA (7a ed.)

Tiberio, S. C. M. (2007). What's up?: Starter : extra practice ; What's up? : starter : fast finishers activities.

Cita Chicago Style (17a ed.)

Tiberio, Silvia Carolina Maldonado. What's Up?: Starter : Extra Practice ; What's Up? : Starter : Fast Finishers Activities. Buenos Aires, 2007.

Cita MLA (9a ed.)

Tiberio, Silvia Carolina Maldonado. What's Up?: Starter : Extra Practice ; What's Up? : Starter : Fast Finishers Activities. 2007.