APA (7th ed.) Citation

Boyle, J. E. (1921). Rural problems in the United States. A.C. McClurg.

Chicago Style (17th ed.) Citation

Boyle, J. E. Rural Problems in the United States. Chicago: A.C. McClurg, 1921.

MLA (9th ed.) Citation

Boyle, J. E. Rural Problems in the United States. A.C. McClurg, 1921.