1.
, , . Child development and family income. York: York Publishing services; 1999.
, et . Child development and family income. York : York Publishing services, 15 juin 1999
Gregg Paul, Harkness Susan, & Machin Stephen. (1999). Child development and family income. York Publishing services.
Style de citation MLA (8e éd.)Gregg Paul, et al. Child Development and Family Income. York Publishing services, 1999.
Attention : ces citations peuvent ne pas être correctes à 100%.