Cita APA (7th ed.)

Dellar, H., & Walkley, A. (2007). Course book Innovations: A course in natural english. Thomson.

Cita Chicago (17th ed.)

Dellar, Hugh, i Andrew Walkley. Course Book Innovations: A Course in Natural English. United Kingdom: Thomson, 2007.

Cita MLA (9th ed.)

Dellar, Hugh, i Andrew Walkley. Course Book Innovations: A Course in Natural English. Thomson, 2007.