The most often used citation styles for History resources is the Chicago Manual of Style. This guide provides examples of citations, but you may also want to look at the Style Guide from Purdue's Online Writing Lab.
The library can guide you to citation management software and resources to help you properly cite your sources.
Latin America's Cold War by 
Human Rights and Transnational Solidarity in Cold War Latin America by 
A Century of Revolution by 
The Decline and Fall of the Lettered City by 