APA (7th ed.) Citation

Montessori, M., & Livingston, A. (2013). Montessori Elementary Materials The Advanced Montessori Method. Project Gutenberg.

Chicago Style (17th ed.) Citation

Montessori, Maria, and Arthur Livingston. Montessori Elementary Materials The Advanced Montessori Method. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Montessori, Maria, and Arthur Livingston. Montessori Elementary Materials The Advanced Montessori Method. Project Gutenberg, 2013.

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