APA (7th ed.) Citation

Astington, J. W., Harris, P. L., & Olson, D. R. (1989). Developing theories of mind. University Press.

Chicago Style (17th ed.) Citation

Astington, Janet W., Paul L. Harris, and David R. Olson. Developing Theories of Mind. Cambridge [etc.]: University Press, 1989.

MLA (9th ed.) Citation

Astington, Janet W., et al. Developing Theories of Mind. University Press, 1989.