APA

Sprout H., Sprout M., . (1971). Toward a politics of the planet earth. New York: Van Nostrand Reinhold Co.

Chicago

Sprout Harold, Sprout Margaret, . 1971. Toward a politics of the planet earth. New York: Van Nostrand Reinhold Co.

Harvard

Sprout H., Sprout M., . (1971). Toward a politics of the planet earth. New York: Van Nostrand Reinhold Co.

MLA

Sprout Harold, Sprout Margaret, . Toward a politics of the planet earth. New York: Van Nostrand Reinhold Co. 1971.