Freidel, F. (1976). America in the twentieth century (4th ed.).
Chicago Style (17th ed.) CitationFreidel, Frank. America in the Twentieth Century. 4th ed. 1976.
MLA (9th ed.) CitationFreidel, Frank. America in the Twentieth Century. 4th ed. 1976.
Warning: These citations may not always be 100% accurate.