APA aipamena

Duerr, W. A. (1960). Fundamentals of forestry economics. McGraw-Hill Book Company.

Chicago Style aipamena

Duerr, William Allen. Fundamentals of Forestry Economics. New York: McGraw-Hill Book Company, 1960.

MLA aipamena

Duerr, William Allen. Fundamentals of Forestry Economics. McGraw-Hill Book Company, 1960.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.