APA (7th ed.) Citation

Piaget, J., Inhelder, B., & Häfliger, L. (1972). Die Psychologie des Kindes. Walter.

Chicago Style (17th ed.) Citation

Piaget, Jean, Bärbel Inhelder, and Lorenz Häfliger. Die Psychologie Des Kindes. Olten Freiburg i. Br: Walter, 1972.

MLA (9th ed.) Citation

Piaget, Jean, et al. Die Psychologie Des Kindes. Walter, 1972.