Παραπομπή σε μορφή APA (7η εκδ.)

Playground and Recreation Association of America. The year book of the Playground and Recreation Association of America. Playground and Recreation Association of America.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Playground and Recreation Association of America. The Year Book of the Playground and Recreation Association of America. New York City: Playground and Recreation Association of America.

Παραπομπή σε μορφή MLA (8th εκδ.)

Playground and Recreation Association of America. The Year Book of the Playground and Recreation Association of America. Playground and Recreation Association of America.