APA (7th ed.) Citation

Yarbrough, W. H., & Bruner, C. V. (1941). A history of the United States by unit plan. Laidlaw.

Chicago Style (17th ed.) Citation

Yarbrough, William Henry, and Clarence Vernon Bruner. A History of the United States by Unit Plan. Chicago: Laidlaw, 1941.

MLA (9th ed.) Citation

Yarbrough, William Henry, and Clarence Vernon Bruner. A History of the United States by Unit Plan. Laidlaw, 1941.