So I'm currently working on my senior project for ma school, and I chose the car as my topic. I need to answer the questions How is it used? and How does it help to make a difference?

i can answer these on my own, but we have to have legitimate sources that include an author. does anybody know any websites that can provide me with the information i need. ive searched and searched but i cant find any straight up sites.

PLZ PLZ PLZ HELP