secondary source

Noun

 * 1)  A written commentary which discusses previously produced original work of another author, especially a notable author.
 * 2)  A study of past events or a past author written from the perspective of a later period of time; a document that draws on one or more historical primary sources and interprets or analyses them, including documents such as newspapers whose accuracy is open to question.

Translations

 * Chinese:
 * Mandarin:
 * Dutch: secundaire bron
 * Finnish:
 * French:
 * Georgian: მეორადი წყარო
 * German: Sekundärquelle
 * Polish: źródło wtórne
 * Russian: