APA
(2015). EARLY WARNING system. U.S.A: United States Agency for International Development.
Chicago
2015. EARLY WARNING system. U.S.A: United States Agency for International Development.
Harvard
(2015). EARLY WARNING system. U.S.A: United States Agency for International Development.
MLA
EARLY WARNING system. U.S.A: United States Agency for International Development. 2015.