Trygg, L. (1991). Engineering design. Some aspects of product development efficiency. Chalmers Tekniska Högskola.
Chicago-Zitierstil (17. Ausg.)Trygg, Lars. Engineering Design. Some Aspects of Product Development Efficiency. Göteborg: Chalmers Tekniska Högskola, 1991.
MLA-Zitierstil (9. Ausg.)Trygg, Lars. Engineering Design. Some Aspects of Product Development Efficiency. Chalmers Tekniska Högskola, 1991.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.