Παραπομπή σε μορφή APA (7η εκδ.)

Roberts, N. S. (2021). Outdoor Adventure Education: Trends and New Directions. MDPI - Multidisciplinary Digital Publishing Institute.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Roberts, Nina S. Outdoor Adventure Education: Trends and New Directions. Basel, Switzerland: MDPI - Multidisciplinary Digital Publishing Institute, 2021.

Παραπομπή σε μορφή MLA (9th εκδ.)

Roberts, Nina S. Outdoor Adventure Education: Trends and New Directions. MDPI - Multidisciplinary Digital Publishing Institute, 2021.