APA (7 वां संस्करण) प्रशस्ति पत्र

Piaget, J., & Roberts, G. -. (1973). To understand is to invent: The future of education. Grossman Pub.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Piaget, Jean, और George -Anne Roberts. To Understand Is to Invent: The Future of Education. New York: Grossman Pub, 1973.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Piaget, Jean, और George -Anne Roberts. To Understand Is to Invent: The Future of Education. Grossman Pub, 1973.