APA (7th ed.) Citation

Stern, W., Stern, C., & Barwell, A. (1924). Psychology of early childhood up to the sixth year of age. H. Holt.

Chicago Style (17th ed.) Citation

Stern, William, Clara Stern, and Anna Barwell. Psychology of Early Childhood Up to the Sixth Year of Age. New York: H. Holt, 1924.

MLA (9th ed.) Citation

Stern, William, et al. Psychology of Early Childhood Up to the Sixth Year of Age. H. Holt, 1924.