Cita APA (7a ed.)

Wittmer, D. S., & Petersen, S. H. (2006). Infant and toddler development and responsive program planning: A relationship-based approach. Pearson/Merrill.

Cita Chicago Style (17a ed.)

Wittmer, Donna S., y Sandra H. Petersen. Infant and Toddler Development and Responsive Program Planning: A Relationship-based Approach. Upper Saddle River, N.J: Pearson/Merrill, 2006.

Cita MLA (9a ed.)

Wittmer, Donna S., y Sandra H. Petersen. Infant and Toddler Development and Responsive Program Planning: A Relationship-based Approach. Pearson/Merrill, 2006.