APA (7th ed.) Citation

Somervell, D. C. (1955). A history of the United States / by D.C. Somervell (2nd ed.). Heinemann.

Chicago Style (17th ed.) Citation

Somervell, D. C. A History of the United States / by D.C. Somervell. 2nd ed. Heinemann, 1955.

MLA (9th ed.) Citation

Somervell, D. C. A History of the United States / by D.C. Somervell. 2nd ed. Heinemann, 1955.

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