Baldwin, Handbook of Psychology, 2 vols. (New York: Holt. London: Macmillans. Abridged in Elements of Psychology).

----, Articles in Appletons' Universal Cyclopædia (New York: Appletons).

Psychology of the Child.

Preyer, The Mind of the Child, 2 vols. (New York: Appletons).

Compayré, Intellectual and Moral Development of the Child, 2 vols. (New York: Appletons).

Sully, Studies of Childhood (New York: Appletons. London: Longmans).

Baldwin, Mental Development in the Child and the Race (New York and London: Macmillans).

Physiological Psychology.

Ziehen, Introduction to Physiological Psychology (London: Sonnenschein. New York: Macmillans).