APA Citation

Beard, C. A. 1., & Beard, C. A. 1. The agricultural era.

Chicago Style Citation

Beard, Charles Austin 1874-1948, and Charles Austin 1874-1948 Beard. The Agricultural Era.

MLA Citation

Beard, Charles Austin 1874-1948, and Charles Austin 1874-1948 Beard. The Agricultural Era.

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