Cita APA (7th ed.)

Jones, L. Ideas. Speaking and listening activities for upper-intermediate students. Student's Book (6a ed.).

Cita Chicago (17th ed.)

Jones, Leo. Ideas. Speaking and Listening Activities for Upper-intermediate Students. Student's Book. 6a ed.

Cita MLA (8th ed.)

Jones, Leo. Ideas. Speaking and Listening Activities for Upper-intermediate Students. Student's Book. 6a ed.