Παραπομπή σε μορφή APA (7η εκδ.)

National Environmental Education Development. National Park Foundation. (1971). Adventure in environment: Teacher's guide. Silver Burdett.

Παραπομπή σε μορφή Chicago (17η εκδ.)

National Environmental Education Development. National Park Foundation. Adventure in Environment: Teacher's Guide. Morristown, NJ: Silver Burdett, 1971.

Παραπομπή σε μορφή MLA (9th εκδ.)

National Environmental Education Development. National Park Foundation. Adventure in Environment: Teacher's Guide. Silver Burdett, 1971.