APA (7th ed.) Citation

Levens, A. S., & Cooper, S. J. (1985). Problems in mechanical drawing (6th ed.). Gregg Division, McGraw-Hill.

Chicago Style (17th ed.) Citation

Levens, A. S., and S. J. Cooper. Problems in Mechanical Drawing. 6th ed. New York: Gregg Division, McGraw-Hill, 1985.

MLA (9th ed.) Citation

Levens, A. S., and S. J. Cooper. Problems in Mechanical Drawing. 6th ed. Gregg Division, McGraw-Hill, 1985.