APA (7th ed.) Citation

Ferrell, R. H. (1971). America as a world power, 1872-1945. University of South Carolina Press.

Chicago Style (17th ed.) Citation

Ferrell, Robert H. America as a World Power, 1872-1945. Columbia, S.C: University of South Carolina Press, 1971.

MLA (9th ed.) Citation

Ferrell, Robert H. America as a World Power, 1872-1945. University of South Carolina Press, 1971.