APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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

Let op: Deze citaties zijn niet altijd 100% accuraat.