APA (7th ed.) Citation

Gerber, R. (1960). Die Sumpfohreule: (Asio flammeus Pont.). Ziemsen.

Chicago Style (17th ed.) Citation

Gerber, Robert. Die Sumpfohreule: (Asio Flammeus Pont.). Wittenberg: Ziemsen, 1960.

MLA (9th ed.) Citation

Gerber, Robert. Die Sumpfohreule: (Asio Flammeus Pont.). Ziemsen, 1960.