Παραπομπή APA

Piaget, J., Marjorie, & Ruth Gabain. (1956). Language and thought of the child (3rd. ed.). Routledge & Kegan Paul.

Παραπομπή Chicago Style

Piaget, Jean, Marjorie, και Ruth Gabain. Language and Thought of the Child. 3rd. ed. Routledge & Kegan Paul, 1956.

Παραπομπή MLA

Piaget, Jean, et al. Language and Thought of the Child. 3rd. ed. Routledge & Kegan Paul, 1956.