Cite

Behavior situation: tower building by child, 56 weeks old.

MLA

Gesell, Arnold, 1880-1961. Behavior situation: tower building by child, 56 weeks old.. 1934. https://collections.library.yale.edu/catalog/10052260.

APA, 6th edition

Gesell, Arnold, 1880-1961. (1934)[Behavior situation: tower building by child, 56 weeks old.]. https://collections.library.yale.edu/catalog/10052260.