(2000). Percentage of Students Enrolled in Distance Education Courses: 1995. U.S. Department of Education.
Παραπομπή σε μορφή Chicago (17η εκδ.)Percentage of Students Enrolled in Distance Education Courses: 1995. U.S. Department of Education, 2000.
Παραπομπή σε μορφή MLA (9th εκδ.)Percentage of Students Enrolled in Distance Education Courses: 1995. U.S. Department of Education, 2000.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.