APA (7th ed.) Citation

Winter, J. M., Wedd, A. F., & Witkop, P. (2002). German Students' War Letters. Pine St. Books.

Chicago Style (17th ed.) Citation

Winter, J. M., A. F. Wedd, and Philipp Witkop. German Students' War Letters. Philadelphia: Pine St. Books, 2002.

MLA (8th ed.) Citation

Winter, J. M., et al. German Students' War Letters. Pine St. Books, 2002.