Não informado. (2003). Engineering and contracting. Gillette Publishing Company.
Chicago-Zitierstil (17. Ausg.)Não informado. Engineering and Contracting. Hammond, Ind: Gillette Publishing Company, 2003.
MLA-Zitierstil (8. Ausg.)Não informado. Engineering and Contracting. Gillette Publishing Company, 2003.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.