APA (7th ed.) Citation

Vonnegut, K. (2008). Armageddon in retrospect: And other new and unpublished writings on war and peace. G.P. Putnam's Sons.

Chicago Style (17th ed.) Citation

Vonnegut, Kurt. Armageddon in Retrospect: And Other New and Unpublished Writings on War and Peace. New York: G.P. Putnam's Sons, 2008.

MLA (9th ed.) Citation

Vonnegut, Kurt. Armageddon in Retrospect: And Other New and Unpublished Writings on War and Peace. G.P. Putnam's Sons, 2008.

Warning: These citations may not always be 100% accurate.