APA (7th ed.) Zitazioa
Polak, P. (1976). A Background to engineering design. The Macmillan press Ltd.
Chicago Style (17th ed.) Zitazioa
Polak, Peter. A Background to Engineering Design. London: The Macmillan press Ltd, 1976.
MLA (9th ed.) Zitazioa
Polak, Peter. A Background to Engineering Design. The Macmillan press Ltd, 1976.
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