Cita APA (7th ed.)

Marshall, G. C. (1976). Schweitzer: A biography. Houghton Mifflin.

Cita Chicago (17th ed.)

Marshall, George C. Schweitzer: A Biography. Boston: Houghton Mifflin, 1976.

Cita MLA (9th ed.)

Marshall, George C. Schweitzer: A Biography. Houghton Mifflin, 1976.