Παραπομπή σε μορφή APA (7η εκδ.)

(2018). Nature-based learning for young children: Anytime, anywhere, on any budget / Julie Powers, Sheila Williams Ridge.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Nature-based Learning for Young Children: Anytime, Anywhere, on Any Budget / Julie Powers, Sheila Williams Ridge. 2018.

Παραπομπή σε μορφή MLA (9th εκδ.)

Nature-based Learning for Young Children: Anytime, Anywhere, on Any Budget / Julie Powers, Sheila Williams Ridge. 2018.