Percentage Distribution of 6- to 12-year-olds, 1972-97. US Department of Education.
Citação do estilo Chicago (17ª ed.)Percentage Distribution of 6- to 12-year-olds, 1972-97. US Department of Education.
Citação MLA (9ª ed.)Percentage Distribution of 6- to 12-year-olds, 1972-97. US Department of Education.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.