APA (7e ed.) Bronvermelding

(2006). Age 2: Findings From the 2-Year-Old Follow-up of the Early Childhood Longitudinal Study, Birth Cohort. U.S. Department of Education.

Chicago (17e ed.) Bronvermelding

Age 2: Findings From the 2-Year-Old Follow-up of the Early Childhood Longitudinal Study, Birth Cohort. U.S. Department of Education, 2006.

MLA (9e ed.) Bronvermelding

Age 2: Findings From the 2-Year-Old Follow-up of the Early Childhood Longitudinal Study, Birth Cohort. U.S. Department of Education, 2006.