APA (7th ed.) Citation

Robinson, H. F., & Schwartz, S. L. (1972). Learning at an early age. Prentice-Hall.

Chicago Style (17th ed.) Citation

Robinson, Helen F., and Sydney L. Schwartz. Learning at an Early Age. Englewood Cliffs, N.J: Prentice-Hall, 1972.

MLA (9th ed.) Citation

Robinson, Helen F., and Sydney L. Schwartz. Learning at an Early Age. Prentice-Hall, 1972.