Primary sources are contemporaneous materials that provide direct evidence or eyewitness accounts of a subject that is under study. Such materials may include books, maps, diaries, manuscripts, letters, artwork, contemporary newspaper articles, advertising, photographs, films, recordings, scientific data, and social media.
Primary sources are materials that are closely related to, or have been issued by, the company that is being studied. Examples of primary sources include:
Secondary sources are materials that report on, analyze, or interpret business events, and that have been created by people or agencies outside the company that is being studied. Examples of secondary sources include:
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