APA (7th ed.) Citation

(1989). The national plant germplasm system of the United States. Timber Pr.

Chicago Style (17th ed.) Citation

The National Plant Germplasm System of the United States. Portland, Or: Timber Pr, 1989.

MLA (9th ed.) Citation

The National Plant Germplasm System of the United States. Timber Pr, 1989.

Warning: These citations may not always be 100% accurate.