Cita APA (7a ed.)
Dellar, H., & Walkley, A. (2004). Innovations: A course in natural English. Thomson Heinle.
Cita Chicago Style (17a ed.)
Dellar, Hugh, y Andrew Walkley. Innovations: A Course in Natural English. Boston: Thomson Heinle, 2004.
Cita MLA (9a ed.)
Dellar, Hugh, y Andrew Walkley. Innovations: A Course in Natural English. Thomson Heinle, 2004.
Precaución: Estas citas no son 100% exactas.