Dyfyniad APA

Osborn Segerberg. (1971). Where have all: The flowers, fishes, birds, trees, water, and air gone? What ecology is all about. New York: David McKay Co.

Dyfyniad Arddull Chicago

Osborn Segerberg. Where Have All: The Flowers, Fishes, Birds, Trees, Water, and Air Gone? What Ecology Is All About. New York: David McKay Co, 1971.

Dyfyniad MLA

Osborn Segerberg. Where Have All: The Flowers, Fishes, Birds, Trees, Water, and Air Gone? What Ecology Is All About. New York: David McKay Co, 1971.

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