APA (7th ed.) Citation

Larkin, J. C., & Duval, C. M. (2013). PPM: Practical problems in mathematics for drafting and CAD (4th ed.). Delmar.

Chicago Style (17th ed.) Citation

Larkin, John C., and Concetta M. Duval. PPM: Practical Problems in Mathematics for Drafting and CAD. 4th ed. Clifton Park, New York: Delmar, 2013.

MLA (9th ed.) Citation

Larkin, John C., and Concetta M. Duval. PPM: Practical Problems in Mathematics for Drafting and CAD. 4th ed. Delmar, 2013.