Dyfyniad APA

Brown, L. R. (1981). Building a sustainable society. Norton.

Dyfyniad Arddull Chicago

Brown, Lester Russell. Building a Sustainable Society. New York: Norton, 1981.

Dyfyniad MLA

Brown, Lester Russell. Building a Sustainable Society. Norton, 1981.

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