| Primary Sources | Secondary Sources | Tertiary Sources | 
| 
			 Primary Sources are obtained from original journal articles published by the researcher, or from their research notes/journals etc. which are not usually available to the average researcher. (see journal listing) 
  | 
			
			 Compilations of data recorded in handbooks of various names and for various purposes. Can usually be found in the reference section of the library. 
  | 
			
			 Least specific with regard to date of reported data, experimental condictions, controls, and the peer reviewed process. 
  | 
		
| 
			 Examples: 
  | 
			
			 Examples: 
 
     
 
			 | 
			
			 Examples: 
 
  | 
		
Sample Secondary Resources (science focus):