Cita APA (7th ed.)

Karplus, R. (1966). Piaget's developmental theory: Conversation [videorecording]. Davidson Films.

Cita Chicago (17th ed.)

Karplus, Robert. Piaget's Developmental Theory: Conversation [videorecording]. San Luis Obispo, Calif: Davidson Films, 1966.

Cita MLA (9th ed.)

Karplus, Robert. Piaget's Developmental Theory: Conversation [videorecording]. Davidson Films, 1966.