Jensen, C. H., & Helsel, J. D. (1979). Engineering drawing and design (2d ed.). Gregg Division, McGraw-Hill.
Chicago Style aipamenaJensen, Cecil Howard, and Jay D. Helsel. Engineering Drawing and Design. 2d ed. New York: Gregg Division, McGraw-Hill, 1979.
MLA aipamenaJensen, Cecil Howard, and Jay D. Helsel. Engineering Drawing and Design. 2d ed. Gregg Division, McGraw-Hill, 1979.
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