FITZPATRICK, F. L. (1964). Our plant resources. Holt.
Cita Chicago (17th ed.)FITZPATRICK, Frederick L. Our Plant Resources. New York: Holt, 1964.
Cita MLA (9th ed.)FITZPATRICK, Frederick L. Our Plant Resources. Holt, 1964.
Atenció: Aquestes cites poden no estar 100% correctes.