APA (7th ed.) Citation

Hjelt, E., & Hjelt, O. E. A. (1890). Principles of general organic chemistry. Longmans, Green, and Co..

Chicago Style (17th ed.) Citation

Hjelt, Edv., and Otto E. A. Hjelt. Principles of General Organic Chemistry. London, New York: Longmans, Green, and Co., 1890.

MLA (8th ed.) Citation

Hjelt, Edv., and Otto E. A. Hjelt. Principles of General Organic Chemistry. Longmans, Green, and Co., 1890.