The National elementary principal. (1957). Parents and the schools. s.n.
Chicagoスタイル(17版)引用形式The National elementary principal. Parents and the Schools. [Washington]: s.n, 1957.
MLA(9版)引用形式The National elementary principal. Parents and the Schools. s.n, 1957.
警告: この引用は必ずしも正確ではありません.