APA (7th ed.) Citation

Urban, W. L. (2019). The last years of the Teutonic Knights. Greenhill Books.

Chicago Style (17th ed.) Citation

Urban, William L. The Last Years of the Teutonic Knights. London: Greenhill Books, 2019.

MLA (9th ed.) Citation

Urban, William L. The Last Years of the Teutonic Knights. Greenhill Books, 2019.