APA (7th ed.) Citation

Hansch, C., & Helmkamp, G. K. (1959). Organic chemistry: An outline : problems and answers. McGraw-Hill.

Chicago Style (17th ed.) Citation

Hansch, Corwin, and George K. Helmkamp. Organic Chemistry: An Outline : Problems and Answers. New York [etc.]: McGraw-Hill, 1959.

MLA (9th ed.) Citation

Hansch, Corwin, and George K. Helmkamp. Organic Chemistry: An Outline : Problems and Answers. McGraw-Hill, 1959.