Giesecke, F. E., Mitchell, A., Spencer, H. C., Hill, I. L., Dygdon, J. T., & Novac, J. E. (2002). Technical drawing (12.). New Jersey, Estados Unidos de América: Prentice Hall Pearson Education Inc..

Giesecke, Fredericck E., Alva Mitchell, Henry Cecil Spencer, Ivan Leroy Hill, John Thomas Dygdon, and James E. Novac. Technical Drawing. 12. New Jersey, Estados Unidos de América: Prentice Hall Pearson Education Inc., 2002.

Giesecke, Fredericck E., et al. Technical Drawing. 12. New Jersey, Estados Unidos de América: Prentice Hall Pearson Education Inc., 2002.