Jensen, C. H., & Helsel, J. D. (1979). Engineering drawing and design (2d ed.). Gregg Division, McGraw-Hill.
Chicago Edition CitationJensen, Cecil Howard, i Jay D. Helsel. Engineering Drawing and Design. 2d ed. New York: Gregg Division, McGraw-Hill, 1979.
Cita MLAJensen, Cecil Howard, i Jay D. Helsel. Engineering Drawing and Design. 2d ed. Gregg Division, McGraw-Hill, 1979.
Atenció: Aquestes cites poden no estar 100% correctes.