APA (7th ed.) Citation

Praeger, R. L., & Fraeger, R. L. (1921). Notes on Down and Dublin plants.

Chicago Style (17th ed.) Citation

Praeger, R. Lloyd, and R. Lloyd Fraeger. Notes on Down and Dublin Plants. 1921.

MLA (9th ed.) Citation

Praeger, R. Lloyd, and R. Lloyd Fraeger. Notes on Down and Dublin Plants. 1921.

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