When writing your narrative, you should consider Elie Wiesel's account in Night and Gerda Weissman's story in One Survivor Remembers. Pay attention to the "voice" of these narrators. You can also read, listen to, and watch other survivor stories in the links below.
SEVERAL SURVIVOR STORIES
Gerda Weissman, One Survivor Remembers (scroll down for film)
AUDIO survivor stories
Holocaust Education & Archive Research Team: Survivor Stories (print text)