Family Characteristics of 6- to 12-year-olds. US Department of Education.
Citazione stile Chigago Style (17a edizione)Family Characteristics of 6- to 12-year-olds. US Department of Education.
Citatione MLA (9a ed.)Family Characteristics of 6- to 12-year-olds. US Department of Education.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.