APA (7th ed.) Citation

Hanel, W., & Unzner-Fischer, C. (1995). The Extraordinary adventures of an ordinary hat. North-South Books.

Chicago Style (17th ed.) Citation

Hanel, Wolfram, and Christa Unzner-Fischer. The Extraordinary Adventures of an Ordinary Hat. New York: North-South Books, 1995.

MLA (9th ed.) Citation

Hanel, Wolfram, and Christa Unzner-Fischer. The Extraordinary Adventures of an Ordinary Hat. North-South Books, 1995.