Schmittel, W. (1975). Design concept realisation: Braun, Citroen, Miller, Olivetti, Sony, Swissair. ABC.
Lua i Stíl Chicago (17ú heag.)Schmittel, Wolfgang. Design Concept Realisation: Braun, Citroen, Miller, Olivetti, Sony, Swissair. Zurich: ABC, 1975.
Lua MLA (9ú heag.)Schmittel, Wolfgang. Design Concept Realisation: Braun, Citroen, Miller, Olivetti, Sony, Swissair. ABC, 1975.
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