Cita APA (7th ed.)

Jones, L. Functions of english. A course for upper-intermediate and more advanced students (3a ed.).

Cita Chicago (17th ed.)

Jones, Leo. Functions of English. A Course for Upper-intermediate and More Advanced Students. 3a ed.

Cita MLA (8th ed.)

Jones, Leo. Functions of English. A Course for Upper-intermediate and More Advanced Students. 3a ed.