APA (7th ed.) Citation

Collier, C. C., & Lerch, H. H. (1969). Teaching mathematics in the modern elementary school. Macmillan.

Chicago Style (17th ed.) Citation

Collier, Calhoun Crofford, and Harold H. Lerch. Teaching Mathematics in the Modern Elementary School. New York: Macmillan, 1969.

MLA (9th ed.) Citation

Collier, Calhoun Crofford, and Harold H. Lerch. Teaching Mathematics in the Modern Elementary School. Macmillan, 1969.