Spencer, H. C., & Dygdon, J. T. (1995). Basic technical drawing (6th ed.). Glencoe.
Chicago Style (17th ed.) CitationSpencer, Henry Cecil, and John T. Dygdon. Basic Technical Drawing. 6th ed. New York: Glencoe, 1995.
MLA (9th ed.) CitationSpencer, Henry Cecil, and John T. Dygdon. Basic Technical Drawing. 6th ed. Glencoe, 1995.
Warning: These citations may not always be 100% accurate.