This document discusses how to effectively incorporate outside sources into an essay through intertextuality and synthesis. It defines intertextuality as incorporating outside sources to support your own ideas and arguments. Synthesis occurs when your ideas and outside sources come together to form a cohesive essay. The document provides examples of how to use outside sources to introduce topics, illustrate points, support arguments, and argue a point. It emphasizes that the essay should present the writer's own ideas supported by outside sources.