Cita APA (7a ed.)

Crichton, J., & Koster, P. (2006). English made easy: Learning English through pictures. Tuttle.

Cita Chicago Style (17a ed.)

Crichton, Jonathan, y Pieter Koster. English Made Easy: Learning English Through Pictures. Rutland, Vt.: Tuttle, 2006.

Cita MLA (8a ed.)

Crichton, Jonathan, y Pieter Koster. English Made Easy: Learning English Through Pictures. Tuttle, 2006.

Precaución: Estas citas no son 100% exactas.