APA (7th ed.) Citation

Urch, E. J. (1939). Scaling the centuries. D.C. Heath.

Chicago Style (17th ed.) Citation

Urch, Erwin J. Scaling the Centuries. Boston: D.C. Heath, 1939.

MLA (9th ed.) Citation

Urch, Erwin J. Scaling the Centuries. D.C. Heath, 1939.

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