Wiener, P. P., & Wiener, P. P. (1973). Abstraction in the formation of concepts to Design argument. Scribner.
Lua i Stíl Chicago (17ú heag.)Wiener, Philip P., agus Philip Paul Wiener. Abstraction in the Formation of Concepts to Design Argument. New York: Scribner, 1973.
Lua MLA (8ú heag.)Wiener, Philip P., agus Philip Paul Wiener. Abstraction in the Formation of Concepts to Design Argument. Scribner, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.