APA (7th ed.) Citation

World Congress of Psychiatry. 4 Madrid (1966) & López Ibor, J. J. (1967). Proceedings / Fourth World Congress of Psychiatry. Excerpta Medica Foundation.

Chicago Style (17th ed.) Citation

World Congress of Psychiatry. 4 Madrid (1966) and Juan José López Ibor. Proceedings / Fourth World Congress of Psychiatry. Amsterdam: Excerpta Medica Foundation, 1967.

MLA (9th ed.) Citation

World Congress of Psychiatry. 4 Madrid (1966) and Juan José López Ibor. Proceedings / Fourth World Congress of Psychiatry. Excerpta Medica Foundation, 1967.