Dyfyniad APA

Hertsgaard, M. (1998). Earth odyssey: Around the world in search of our environmental future. Broadway Books.

Dyfyniad Arddull Chicago

Hertsgaard, Mark. Earth Odyssey: Around the World in Search of Our Environmental Future. New York: Broadway Books, 1998.

Dyfyniad MLA

Hertsgaard, Mark. Earth Odyssey: Around the World in Search of Our Environmental Future. Broadway Books, 1998.

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