APA (7th ed.) Citation

Knowlton, C. Fruits of Philosophy: A Treatise on the Population Question.

Chicago Style (17th ed.) Citation

Knowlton, Charles. Fruits of Philosophy: A Treatise on the Population Question.

MLA (9th ed.) Citation

Knowlton, Charles. Fruits of Philosophy: A Treatise on the Population Question.

Warning: These citations may not always be 100% accurate.