APA (7th ed.) Citation

Hunter, G. W. (1923). New essentials of biology presented in problems. American book company.

Chicago Style (17th ed.) Citation

Hunter, George W. New Essentials of Biology Presented in Problems. New York, Cincinnati [etc.]: American book company, 1923.

MLA (9th ed.) Citation

Hunter, George W. New Essentials of Biology Presented in Problems. American book company, 1923.