Amstutz, W. (1962). Who's who in graphic art. Amstutz and Herdeg Graphis Press.
Lua i Stíl Chicago (17ú heag.)Amstutz, Walter. Who's Who in Graphic Art. Zurich: Amstutz and Herdeg Graphis Press, 1962.
Lua MLA (9ú heag.)Amstutz, Walter. Who's Who in Graphic Art. Amstutz and Herdeg Graphis Press, 1962.
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