Dyfyniad APA

Brainerd, J. W. (1971). Nature study for conservation: A handbook for environmental education. MacMillan.

Dyfyniad Arddull Chicago

Brainerd, John W. Nature Study for Conservation: A Handbook for Environmental Education. New York: MacMillan, 1971.

Dyfyniad MLA

Brainerd, John W. Nature Study for Conservation: A Handbook for Environmental Education. MacMillan, 1971.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.