APA (7th ed.) Citation

Gál, H., Gál, H., Gál, H., & Gál, H. (2014). Music behind barbed wire: A diary of summer 1940 (1. publ.). Toccata Press.

Chicago Style (17th ed.) Citation

Gál, Hans, Hans Gál, Hans Gál, and Hans Gál. Music Behind Barbed Wire: A Diary of Summer 1940. 1. publ. London: Toccata Press, 2014.

MLA (9th ed.) Citation

Gál, Hans, et al. Music Behind Barbed Wire: A Diary of Summer 1940. 1. publ. Toccata Press, 2014.