Dyfyniad APA

Whitaker, J. R., & Ackerman, E. A. (1951). American resources: Their management and conservation. Harcourt, Brace and Co..

Dyfyniad Arddull Chicago

Whitaker, J. Russell, and Edward A. Ackerman. American Resources: Their Management and Conservation. New York: Harcourt, Brace and Co., 1951.

Dyfyniad MLA

Whitaker, J. Russell, and Edward A. Ackerman. American Resources: Their Management and Conservation. Harcourt, Brace and Co., 1951.

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