APA (7th ed.) Citation

Ausubel, D. P., & O'Sullivan, E. V. (1970). Theory and problems of child development (2d ed.). Grune & Stratton.

Chicago Style (17th ed.) Citation

Ausubel, David Paul, and Edmund V. O'Sullivan. Theory and Problems of Child Development. 2d ed. New York: Grune & Stratton, 1970.

MLA (9th ed.) Citation

Ausubel, David Paul, and Edmund V. O'Sullivan. Theory and Problems of Child Development. 2d ed. Grune & Stratton, 1970.