Cita APA

Blake, B., Becher, A., Hyde, D., & Gilbert, D. (2004). The new key to Costa Rica (17. edition.). Berkeley, CA: Ulysses Press.

Citación estilo Chicago

Blake, Beatrice, Anne Becher, Deirdre Hyde, y David Gilbert. The New Key to Costa Rica. 17. edition. Berkeley, CA: Ulysses Press, 2004.

Cita MLA

Blake, Beatrice, Anne Becher, Deirdre Hyde, y David Gilbert. The New Key to Costa Rica. 17. edition. Berkeley, CA: Ulysses Press, 2004.