APA-ийн эшлэл(7 дахь хэвлэлт)

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.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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 -ийн эшлэл (9 дэх хэвлэлт)

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.