This document discusses the importance of using sources in journalism. It provides several reasons for using sources, such as adding human-level context and expertise, providing different perspectives, and satisfying reader expectations. Credible sources are the primary way reporters establish credibility and help readers reach their own conclusions. The document outlines different types of sources, such as human sources, documents, data, and organizations. It also discusses best practices for identifying, attributing, and relating to sources to produce well-rounded reporting.