Παραπομπή σε μορφή APA (7η εκδ.)

Energy and Man's Environment. Conservation of energy: Idea and activity guide. Energy and Man's Environment.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Energy and Man's Environment. Conservation of Energy: Idea and Activity Guide. Portland, OR: Energy and Man's Environment.

Παραπομπή σε μορφή MLA (9th εκδ.)

Energy and Man's Environment. Conservation of Energy: Idea and Activity Guide. Energy and Man's Environment.