Cita APA (7th ed.)

Guillaume, R., & Ritz, D. (2002). Guillaume: A life. University of Missouri Press.

Cita Chicago (17th ed.)

Guillaume, Robert, i David Ritz. Guillaume: A Life. Columbia: University of Missouri Press, 2002.

Cita MLA (9th ed.)

Guillaume, Robert, i David Ritz. Guillaume: A Life. University of Missouri Press, 2002.