Gorman, R. M. (1972). Discovering Piaget: A guide for teachers. Merrill.
Cita Chicago (17th ed.)Gorman, Richard M. Discovering Piaget: A Guide for Teachers. Columbus, Ohio: Merrill, 1972.
Cita MLA (8th ed.)Gorman, Richard M. Discovering Piaget: A Guide for Teachers. Merrill, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.