Cita APA (7th ed.)
Brearley, M., & Hitchfield, E. (1966). A guide to reading Piaget.
Cita Chicago (17th ed.)
Brearley, Molly, i Elizabeth Hitchfield. A Guide to Reading Piaget. 1966.
Cita MLA (9th ed.)
Brearley, Molly, i Elizabeth Hitchfield. A Guide to Reading Piaget. 1966.
Atenció: Aquestes cites poden no estar 100% correctes.