APA
Piaget J. . I. B., . (1969). Psychology of the Child. : Routledge And Keynpaul.
Chicago
Piaget Jean Inhelder Barbel, . 1969. Psychology of the Child. : Routledge And Keynpaul.
Harvard
Piaget J. . I. B., . (1969). Psychology of the Child. : Routledge And Keynpaul.
MLA
Piaget Jean Inhelder Barbel, . Psychology of the Child. : Routledge And Keynpaul. 1969.
