Παραπομπή APA

Upton, P., & Upton, D. (2011). Developmental psychology: Critical thinking in psychology.

Παραπομπή Chicago Style

Upton, Penny, και Dominic Upton. Developmental Psychology: Critical Thinking in Psychology. Graet Britain, 2011.

Παραπομπή MLA

Upton, Penny, και Dominic Upton. Developmental Psychology: Critical Thinking in Psychology. 2011.