APA (7th ed.) Citation

Haugen, T. (1980). Geheimnisse hinter Türen. Benziger.

Chicago Style (17th ed.) Citation

Haugen, Tormod. Geheimnisse Hinter Türen. Köln: Benziger, 1980.

MLA (9th ed.) Citation

Haugen, Tormod. Geheimnisse Hinter Türen. Benziger, 1980.

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