Não informado. (1926). Bulletin of the National Association of Secondary School Principals. National Association of Secondary School Principals.
Chicago Style (17th ed.) CitationNão informado. Bulletin of the National Association of Secondary School Principals. Washington: National Association of Secondary School Principals, 1926.
MLA (8th ed.) CitationNão informado. Bulletin of the National Association of Secondary School Principals. National Association of Secondary School Principals, 1926.
Warning: These citations may not always be 100% accurate.