Cita APA (7th ed.)

ISENBERG, J. P., & JACOBS, J. E. (1982). Playthings as learning tools: A parents guide. John Wiley and Sons.

Cita Chicago (17th ed.)

ISENBERG, Joan P., i Judith E. JACOBS. Playthings as Learning Tools: A Parents Guide. New York: John Wiley and Sons, 1982.

Cita MLA (9th ed.)

ISENBERG, Joan P., i Judith E. JACOBS. Playthings as Learning Tools: A Parents Guide. John Wiley and Sons, 1982.