APA-Zitierstil (7. Ausg.)

Butler, N. M. (1940). Across the busy years: Recollections and reflections. Scribner.

Chicago-Zitierstil (17. Ausg.)

Butler, Nicholas Murray. Across the Busy Years: Recollections and Reflections. New York [u.a.]: Scribner, 1940.

MLA-Zitierstil (9. Ausg.)

Butler, Nicholas Murray. Across the Busy Years: Recollections and Reflections. Scribner, 1940.