Cita APA (7a ed.)

Zweiback, M. (2009). Keys to toilet training (2nd ed.). Barron's Educational Series, Inc..

Cita Chicago Style (17a ed.)

Zweiback, Meg. Keys to Toilet Training. 2nd ed. Hauppauge, N.Y.: Barron's Educational Series, Inc., 2009.

Cita MLA (8a ed.)

Zweiback, Meg. Keys to Toilet Training. 2nd ed. Barron's Educational Series, Inc., 2009.

Precaución: Estas citas no son 100% exactas.