Reliable sources are materials that provide accurate and trustworthy information. These sources are often created by experts in a specific field, such as academic journals, government publications, and reputable news organizations. They undergo rigorous fact-checking and editorial processes to ensure the information is credible and up-to-date. When evaluating a source, consider its authorship, publication date, and the evidence provided. Reliable sources typically cite their references and are free from bias. Examples include The New York Times, National Geographic, and peer-reviewed journals, which are known for their commitment to factual reporting and research integrity.