APA (7e ed.) Bronvermelding

De Ropp, R. S. (1957). Drugs and the mind. Grove Press.

Chicago (17e ed.) Bronvermelding

De Ropp, Robert S. Drugs and the Mind. New York: Grove Press, 1957.

MLA (9e ed.) Bronvermelding

De Ropp, Robert S. Drugs and the Mind. Grove Press, 1957.