APA

National Center for Education Statistics, . (1999). Education statistics quarterly. Washington,D.C: National Center for Education Statistics, Institute of Education Sciencies, U.S. Dept. of Education.

Chicago

National Center for Education Statistics, . 1999. Education statistics quarterly. Washington,D.C: National Center for Education Statistics, Institute of Education Sciencies, U.S. Dept. of Education.

Harvard

National Center for Education Statistics, . (1999). Education statistics quarterly. Washington,D.C: National Center for Education Statistics, Institute of Education Sciencies, U.S. Dept. of Education.

MLA

National Center for Education Statistics, . Education statistics quarterly. Washington,D.C: National Center for Education Statistics, Institute of Education Sciencies, U.S. Dept. of Education. 1999.