Παραπομπή σε μορφή APA (7η εκδ.)

Clark, J. M. (1967). Preface to social economics: Essays on economic theory and social problems. Kelley.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Clark, John Maurice. Preface to Social Economics: Essays on Economic Theory and Social Problems. New York: Kelley, 1967.

Παραπομπή σε μορφή MLA (9th εκδ.)

Clark, John Maurice. Preface to Social Economics: Essays on Economic Theory and Social Problems. Kelley, 1967.