sources say 

Typically used in news articles where no actual source is provided, allows reporting opinions and rumors as actual news.

CNN/MSNC/BUZZFEED/ABC/NYT/WP/GUARDIAN: Sources say President Trump gave Putin a handjob while handing over nuclear launch codes.

Idiot: HOLY FUCK BLOMF BTFO IMPEACHMENT IMMINENT

sources say by Bungins June 2, 2017

When you need to find a source that says certain things and are unable to do so and end up making your own (source) aka Social Studie 

Fictional sources made up by yourself.

Our world is one which is unable to accurately acknowledge the past, and the toughness of the situations that occured in the past because our own view is so ascewed to that of people from even a centery ago. Despite this people attempt to use our own morals and ethics in order to deem whether or not past events were appropiate, which is something that cannot be done -Charles Gentley inventor of When you need to find a source that says certain things and are unable to do so and end up making your own (source) aka Social Studies

When you need to find a source that says certain things and are unable to do so and end up making your own (source) aka Social Studie by Charles gentley February 20, 2017