APA (7th ed.) Citation

Horrigan, P. A. (1970). The challenge of chemistry. McGraw-Hill.

Chicago Style (17th ed.) Citation

Horrigan, Philip A. The Challenge of Chemistry. New York: McGraw-Hill, 1970.

MLA (8th ed.) Citation

Horrigan, Philip A. The Challenge of Chemistry. McGraw-Hill, 1970.