Παραπομπή σε μορφή APA (7η εκδ.)

(2007). Timing & Duration of Student Participation in Special Education in the Primary Grades. U.S. Department of Education.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Timing & Duration of Student Participation in Special Education in the Primary Grades. U.S. Department of Education, 2007.

Παραπομπή σε μορφή MLA (9th εκδ.)

Timing & Duration of Student Participation in Special Education in the Primary Grades. U.S. Department of Education, 2007.