Gaya APA

Gesell, A., Amatruda, C, S. (1947). Development Diagnosis Normal and Abnormal Child Development (2). New York: Paul B. Boeber.

Gaya MLA

Gesell, Arnold., Amatruda, Catherine, S.. "Development Diagnosis Normal and Abnormal Child Development". 2 New York: Paul B. Boeber, 1947. Text.