APA (7th ed.) Citation

Não informado. (1960). Educators Guide to Free Science Materials. Educators Progress Service.

Chicago Style (17th ed.) Citation

Não informado. Educators Guide to Free Science Materials. Randolph, Wis: Educators Progress Service, 1960.

MLA (8th ed.) Citation

Não informado. Educators Guide to Free Science Materials. Educators Progress Service, 1960.

Warning: These citations may not always be 100% accurate.