APA (7th ed.) Citation

Helming, H. (1970). El sistema montessori. Luis Miracle.

Chicago Style (17th ed.) Citation

Helming, Helene. El Sistema Montessori. Luis Miracle, 1970.

MLA (9th ed.) Citation

Helming, Helene. El Sistema Montessori. Luis Miracle, 1970.

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