APA Citation

DUFF. (1995). Freehand sketching for engineering design. Boston: PWS Pub..

Chicago Style Citation

DUFF. Freehand Sketching for Engineering Design. Boston: PWS Pub., 1995.

MLA Citation

DUFF. Freehand Sketching for Engineering Design. Boston: PWS Pub., 1995.

Warning: These citations may not always be 100% accurate.