APA (7th ed.) Citation

Duvoisin, R. (1969). What is right for tulip.

Chicago Style (17th ed.) Citation

Duvoisin, Roger. What Is Right for Tulip. 1969.

MLA (9th ed.) Citation

Duvoisin, Roger. What Is Right for Tulip. 1969.

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