APA (7th ed.) Citation

(1964). Probleme der Orchideengattung Ophrys.

Chicago Style (17th ed.) Citation

Probleme Der Orchideengattung Ophrys. 1964.

MLA (9th ed.) Citation

Probleme Der Orchideengattung Ophrys. 1964.

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