United States. National Center for Construction Education and Research. (2008). Sheet metal level 1: Trainee guide (3rd ed.). Prentice Hall.
Chicago Style (17th ed.) CitationUnited States. National Center for Construction Education and Research. Sheet Metal Level 1: Trainee Guide. 3rd ed. Upper Saddle River, NJ: Prentice Hall, 2008.
MLA (8th ed.) CitationUnited States. National Center for Construction Education and Research. Sheet Metal Level 1: Trainee Guide. 3rd ed. Prentice Hall, 2008.
Warning: These citations may not always be 100% accurate.