Não informado. Swiss technics. Swiss Association of Machinery Manufacturers, Swiss Office for the Development of Trade.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Swiss Technics. Lausanne, Suíça: Swiss Association of Machinery Manufacturers, Swiss Office for the Development of Trade.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Swiss Technics. Swiss Association of Machinery Manufacturers, Swiss Office for the Development of Trade.
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