APA (7th ed.) Citation

Ladd, C. E., & Ball, J. S. (1920). A system of farm cost accounting. Govt. print. off.

Chicago Style (17th ed.) Citation

Ladd, C. E., and James Stewart Ball. A System of Farm Cost Accounting. Washington: Govt. print. off, 1920.

MLA (9th ed.) Citation

Ladd, C. E., and James Stewart Ball. A System of Farm Cost Accounting. Govt. print. off, 1920.