APA (7. basım) Alıntı

Não informado. (1926). Bulletin of the National Association of Secondary School Principals. National Association of Secondary School Principals.

Chicago Style (17. basım) Atıf

Não informado. Bulletin of the National Association of Secondary School Principals. Washington: National Association of Secondary School Principals, 1926.

MLA (8th ed.) Atıf

Não informado. Bulletin of the National Association of Secondary School Principals. National Association of Secondary School Principals, 1926.

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