Plant, J. S. (1950). The envelope: A study of the impact of the world upon the child. Commonwealth Fund.
Citazione stile Chigago Style (17a edizione)Plant, James Stuart. The Envelope: A Study of the Impact of the World upon the Child. New York: Commonwealth Fund, 1950.
Citatione MLA (9a ed.)Plant, James Stuart. The Envelope: A Study of the Impact of the World upon the Child. Commonwealth Fund, 1950.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.