APA aipamena

(2006). Qualifications of Public Secondary School History Teachers, 1999-2000. U.S. Department of Education.

Chicago Style aipamena

Qualifications of Public Secondary School History Teachers, 1999-2000. U.S. Department of Education, 2006.

MLA aipamena

Qualifications of Public Secondary School History Teachers, 1999-2000. U.S. Department of Education, 2006.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.