APA (7th ed.) Citation

Feil, O., & Premstaller, O. (1955). A. D. 1955 Ottmar Premstaller.

Chicago Style (17th ed.) Citation

Feil, Otto, and Ottmar Premstaller. A. D. 1955 Ottmar Premstaller. [S. l.], 1955.

MLA (9th ed.) Citation

Feil, Otto, and Ottmar Premstaller. A. D. 1955 Ottmar Premstaller. 1955.

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