National Association of Secondary School Principals (U.S.). Schools in the middle: Theory into practice. National Association of Secondary School Principals.
Chicago Style (17th ed.) CitationNational Association of Secondary School Principals (U.S.). Schools in the Middle: Theory into Practice. Reston: National Association of Secondary School Principals.
MLA (9th ed.) CitationNational Association of Secondary School Principals (U.S.). Schools in the Middle: Theory into Practice. National Association of Secondary School Principals.
Warning: These citations may not always be 100% accurate.