APA (7th ed.) Zitazioa

Schopmeyer, C. S. (1974). Seeds of woody plants in the United States. Forest Service.

Chicago Style (17th ed.) Zitazioa

Schopmeyer, C. S. Seeds of Woody Plants in the United States. Washington, D.C: Forest Service, 1974.

MLA (9th ed.) Zitazioa

Schopmeyer, C. S. Seeds of Woody Plants in the United States. Forest Service, 1974.