Dyfyniad APA

(2000). Elementary & Secondary School Enrollment: Fall 1970-2008. U.S. Department of Education.

Dyfyniad Arddull Chicago

Elementary & Secondary School Enrollment: Fall 1970-2008. U.S. Department of Education, 2000.

Dyfyniad MLA

Elementary & Secondary School Enrollment: Fall 1970-2008. U.S. Department of Education, 2000.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.