APA (7th ed.) Zitazioa
Princiotta, D., & Fortune, A. (Mar 2009). The Quality Imperative: A State Guide to Achieving the Promise of Extended Learning Opportunities. NGA Center for Best Practices.
Chicago Style (17th ed.) Zitazioa
Princiotta, Daniel, eta Ayeola Fortune. "The Quality Imperative: A State Guide to Achieving the Promise of Extended Learning Opportunities." NGA Center for Best Practices Mar 2009.
MLA (9th ed.) Zitazioa
Princiotta, Daniel, eta Ayeola Fortune. "The Quality Imperative: A State Guide to Achieving the Promise of Extended Learning Opportunities." NGA Center for Best Practices, Mar 2009.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.