Dyfyniad APA

Graham, F. (1970). Since silent spring. New York: Fawcett World Library Publications.

Dyfyniad Arddull Chicago

Graham, Frank. Since Silent Spring. New York: Fawcett World Library Publications, 1970.

Dyfyniad MLA

Graham, Frank. Since Silent Spring. New York: Fawcett World Library Publications, 1970.

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