APA

United State, . (1974). Seeds of woody plants in the United States. Washington D. C: USDA, Forest Service.

Chicago

United State, . 1974. Seeds of woody plants in the United States. Washington D. C: USDA, Forest Service.

Harvard

United State, . (1974). Seeds of woody plants in the United States. Washington D. C: USDA, Forest Service.

MLA

United State, . Seeds of woody plants in the United States. Washington D. C: USDA, Forest Service. 1974.