Cita APA (7a ed.)

Maxwell, C. (2009). Upbeat; pre-intermediate, motivator. Person educación.

Cita Chicago Style (17a ed.)

Maxwell, Clare. Upbeat; Pre-intermediate, Motivator. Harlow: Person educación, 2009.

Cita MLA (8a ed.)

Maxwell, Clare. Upbeat; Pre-intermediate, Motivator. Person educación, 2009.