The document outlines different types of information sources and distinguishes between primary and secondary sources. It notes that news broadcasts, websites and newspapers provide information within days or weeks, while magazines, reports and statistics provide information within weeks or months. Books, textbooks and encyclopedias contain information gathered over years. Primary sources include original works like speeches, laws, journals and studies, while secondary sources discuss and analyze primary sources in books, magazines and essays. The document provides hints for identifying primary sources, like references to original research, and secondary sources, like reviews of other works.