APA (7e ed.) Bronvermelding

Helen Dwight Reid Educational Foundation. (1971). Journal of Environmental Education. Heldref Publications.

Chicago (17e ed.) Bronvermelding

Helen Dwight Reid Educational Foundation. Journal of Environmental Education. Washington: Heldref Publications, 1971.

MLA (8e ed.) Bronvermelding

Helen Dwight Reid Educational Foundation. Journal of Environmental Education. Heldref Publications, 1971.

Let op: Deze citaties zijn niet altijd 100% accuraat.