Heywood, L. M. (2015). African Americans in U.S. foreign policy: From the era of Frederick Douglass to the age of Obama. University of Illinois Press.
芝加哥风格引文Heywood, Linda M. African Americans in U.S. Foreign Policy: From the Era of Frederick Douglass to the Age of Obama. Urbana, Illinois: University of Illinois Press, 2015.
MLA引文Heywood, Linda M. African Americans in U.S. Foreign Policy: From the Era of Frederick Douglass to the Age of Obama. University of Illinois Press, 2015.
警告：这些引文格式不一定是100％准确.