APA (7th ed.) Citation

Cleland, R. E. (1972). Oenothera.

Chicago Style (17th ed.) Citation

Cleland, Ralph Erskine. Oenothera. 1972.

MLA (9th ed.) Citation

Cleland, Ralph Erskine. Oenothera. 1972.

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