Cite

Average Americans / by Theodore Roosevelt, lieutenant-colonel, U.S.A.

MLA

Roosevelt, Theodore, 1887-1944. Average Americans / by Theodore Roosevelt, lieutenant-colonel, U.S.A.. 1919. https://collections.library.yale.edu/catalog/16173390.

APA, 6th edition

Roosevelt, Theodore, 1887-1944. (1919)[Average Americans / by Theodore Roosevelt, lieutenant-colonel, U.S.A.]. https://collections.library.yale.edu/catalog/16173390.