1.
, , . The essential Piaget. Northvale, N.J: J.Aronson; 1995.
, et . The essential Piaget. Northvale, N.J : J.Aronson, 16 juin 1995. ISBN 1-568-21520-7
Piaget Jean, Gruber Howard Ernest, & Vonèche Jacques. (1995). The essential Piaget. J.Aronson.
MLA (8th ed.) CitationPiaget Jean, et al. The Essential Piaget. J.Aronson, 1995.
Warning: These citations may not always be 100% accurate.