APA (7th ed.) Citation

Simpson, D. M. (1968). Learning to learn. C. E. Merrill Pub. Co.

Chicago Style (17th ed.) Citation

Simpson, Dorothy M. Learning to Learn. Columbus, Ohio: C. E. Merrill Pub. Co, 1968.

MLA (8th ed.) Citation

Simpson, Dorothy M. Learning to Learn. C. E. Merrill Pub. Co, 1968.