Cita APA (7a ed.)

Witkop, P., Wedd, A. F., & Winter, J. M. (2002). German students' war letters. Pine St. Books.

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

Witkop, Philipp, et al. German Students' War Letters. Pine St. Books, 2002.