Fleegler, R., Huebner, A., & Patterson, J. (2004). Twentieth-century United States history. Washington: United States Department of State, Bureau of Educational and Cultural Affairs.
Παραπομπή Chicago StyleFleegler, Robert, Andrew Huebner, και James Patterson. Twentieth-century United States History. Washington: United States Department of State, Bureau of Educational and Cultural Affairs, 2004.
MLA引文Fleegler, Robert, Andrew Huebner, και James Patterson. Twentieth-century United States History. Washington: United States Department of State, Bureau of Educational and Cultural Affairs, 2004.
警告：這些引文格式不一定是100％准確.