APA (7th ed.) Citation

Turner, J. S., & Helms, D. B. (1991). Lifespan development (4. ed.). Harcourt Brace Jovanovich.

Chicago Style (17th ed.) Citation

Turner, Jeffrey S., and Donald B. Helms. Lifespan Development. 4. ed. Forth Worth u.a: Harcourt Brace Jovanovich, 1991.

MLA (9th ed.) Citation

Turner, Jeffrey S., and Donald B. Helms. Lifespan Development. 4. ed. Harcourt Brace Jovanovich, 1991.