Cita APA (7a ed.)

International William T. Preyer Symposium, Eckardt, G., & Preyer, W. T. (1985). Contributions to a history of developmental psychology: International William T. Preyer Symposium. New Babylon.

Cita Chicago Style (17a ed.)

International William T. Preyer Symposium, Georg Eckardt, y William T. Preyer. "Contributions to a History of Developmental Psychology: International William T. Preyer Symposium." New Babylon 1985.

Cita MLA (9a ed.)

International William T. Preyer Symposium, et al. "Contributions to a History of Developmental Psychology: International William T. Preyer Symposium." New Babylon, 1985.