APA (7th ed.) Citation

Ausländer, C., Valley, E., & Simon, R. Guide to the former concentration camp of Mauthausen.

Chicago Style (17th ed.) Citation

Ausländer, Cilli, Emile Valley, and Robert Simon. Guide to the Former Concentration Camp of Mauthausen.

MLA (8th ed.) Citation

Ausländer, Cilli, et al. Guide to the Former Concentration Camp of Mauthausen.