APA (7th ed.) Citation

Cole, R. C., & Hobart, D. E. (1946). Drawing problems for technical students. D.C. Heath and Co..

Chicago Style (17th ed.) Citation

Cole, Robert Carl, and Dean Estes Hobart. Drawing Problems for Technical Students. Boston: D.C. Heath and Co., 1946.

MLA (9th ed.) Citation

Cole, Robert Carl, and Dean Estes Hobart. Drawing Problems for Technical Students. D.C. Heath and Co., 1946.