APA (7th ed.) Citation

Freytag, H. (1979). Dunkelkammer-Praxis. Heering.

Chicago Style (17th ed.) Citation

Freytag, Heinrich. Dunkelkammer-Praxis. Seebruck a. Chiemsee: Heering, 1979.

MLA (9th ed.) Citation

Freytag, Heinrich. Dunkelkammer-Praxis. Heering, 1979.

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