APA (7th ed.) Citation

Prüfer, J. (1930). Federico Froebel. Labor.

Chicago Style (17th ed.) Citation

Prüfer, Johannes. Federico Froebel. Barcelona: Labor, 1930.

MLA (9th ed.) Citation

Prüfer, Johannes. Federico Froebel. Labor, 1930.

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