APA (7e ed.) Bronvermelding

The National elementary principal. (1957). Parents and the schools. s.n.

Chicago (17e ed.) Bronvermelding

The National elementary principal. Parents and the Schools. [Washington]: s.n, 1957.

MLA (9e ed.) Bronvermelding

The National elementary principal. Parents and the Schools. s.n, 1957.

Let op: Deze citaties zijn niet altijd 100% accuraat.