Cita APA (7a ed.)

Klanten, R., Ehmann, S., & Wagner, O. (2009). Play all day: Design for children. Gestalten.

Cita Chicago Style (17a ed.)

Klanten, Robert, Sven Ehmann, y Ole Wagner. Play All Day: Design for Children. [Berlin]: Gestalten, 2009.

Cita MLA (9a ed.)

Klanten, Robert, et al. Play All Day: Design for Children. Gestalten, 2009.