Wierda, L. S. (1990). Cost information tools for designers: A survey of problems and possibilities with an emphasis on mass produced sheet metal parts. Technická univerzita.
Chicago-Zitierstil (17. Ausg.)Wierda, Leo Simon. Cost Information Tools for Designers: A Survey of Problems and Possibilities with an Emphasis on Mass Produced Sheet Metal Parts. Delft: Technická univerzita, 1990.
MLA-Zitierstil (9. Ausg.)Wierda, Leo Simon. Cost Information Tools for Designers: A Survey of Problems and Possibilities with an Emphasis on Mass Produced Sheet Metal Parts. Technická univerzita, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.