APA (7th ed.) Citation

Usinger, F., Unsinger, F., & Barker, C. R. (1980). Letters to England / Fritz Usinger ; edited by Christine R. Barker. Hutton Press.

Chicago Style (17th ed.) Citation

Usinger, Fritz, Fritz Unsinger, and Christine R. Barker. Letters to England / Fritz Usinger ; Edited by Christine R. Barker. (Hutton): Hutton Press, 1980.

MLA (9th ed.) Citation

Usinger, Fritz, et al. Letters to England / Fritz Usinger ; Edited by Christine R. Barker. Hutton Press, 1980.

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