Dyfyniad APA

Ward, B. (1972). Only one earth: The care and maintenance of a small planet. Australia: Penguin Books.

Dyfyniad Arddull Chicago

Ward, Barbara. Only One Earth: The Care and Maintenance of a Small Planet. Australia: Penguin Books, 1972.

Dyfyniad MLA

Ward, Barbara. Only One Earth: The Care and Maintenance of a Small Planet. Australia: Penguin Books, 1972.

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