APA (7th ed.) Citation

Colman, S., & Coan, C. A. (1971). Nature's harmonic unity: A treatise on its relation to proportional form. B. Blom.

Chicago Style (17th ed.) Citation

Colman, Samuel, and Clarence Arthur Coan. Nature's Harmonic Unity: A Treatise on Its Relation to Proportional Form. New York: B. Blom, 1971.

MLA (9th ed.) Citation

Colman, Samuel, and Clarence Arthur Coan. Nature's Harmonic Unity: A Treatise on Its Relation to Proportional Form. B. Blom, 1971.