APA aipamena

(2000). Trends in Science Performance of 9-, 13-, & 17-year olds. U.S. Department of Education.

Chicago Style aipamena

Trends in Science Performance of 9-, 13-, & 17-year Olds. U.S. Department of Education, 2000.

MLA aipamena

Trends in Science Performance of 9-, 13-, & 17-year Olds. U.S. Department of Education, 2000.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.