APA (7th ed.) Citation

International Congress of Psychology. (1935). Acta psychologica. Martinus Nijhoff.

Chicago Style (17th ed.) Citation

International Congress of Psychology. Acta Psychologica. The Hague: Martinus Nijhoff, 1935.

MLA (8th ed.) Citation

International Congress of Psychology. Acta Psychologica. Martinus Nijhoff, 1935.