This activity is intended to help students understand the types of sources that are most commonly cited in research in a specific discipline or field. Students will review the citations from multiple relevant journal articles to identify the types of sources that are often cited. They will also be encouraged to consider why certain types of sources may be more cited than others, and what may be missing by relying primarily on certain types of sources. In addition, students will get practice in identifying the appropriate citation format for different types of sources.