Primary vs Secondary Sources

Primary sources can be

• data obtained through original research --  scholarly, peer-reviewed articles 
• accounts by an eyewitness or the first recorder of an event -- newspaper articles
  
• creative works such as poetry, music, or art
• artifacts such as pottery, furniture, and buildings.

Secondary sources are works that

• analyze
• evaluate
• interpret, or
  
• criticize primary sources

Secondary sources are generally magazines and other non-scholarly sources such as popular books. However, your textbook is a secondary source; it analyzes, evaluates, and interprets information in primary sources.

The Huffington Post article on the link between cannabis and suicide.

Smoking Weed Could Cost Teens [Internet] [cited 2015 2/17/2015]. Available from: http://www.huffingtonpost.com/2014/10/29/smoking-weed-could-cost-teens_n_6063600.html