APA (7th ed.) Citation

Wagner, W. L., Stockhouse, R. E., & Klein, W. M. (1985). The systematics and evolution of the Oenothera caespitosa species complex (Onagraceae). Missouri Botanical Garden.

Chicago Style (17th ed.) Citation

Wagner, Warren Lambert, Robert E. Stockhouse, and William M. Klein. The Systematics and Evolution of the Oenothera Caespitosa Species Complex (Onagraceae). [St. Louis, Mo.]: Missouri Botanical Garden, 1985.

MLA (9th ed.) Citation

Wagner, Warren Lambert, et al. The Systematics and Evolution of the Oenothera Caespitosa Species Complex (Onagraceae). Missouri Botanical Garden, 1985.