American Psychological Association (APA)
Four-barrel. (n.d.). Sports Illustrated NASCAR Glossary. Retrieved March 22, 2023, from website: http://www.expertglossary.com/definition/four-barrel.
Chicago Manual of Style (CMS)
Four-barrel. sportsillustrated.cnn.com. Sports Illustrated NASCAR Glossary. Sports Illustrated. http://www.expertglossary.com/definition/four-barrel (accessed: March 22, 2023).
Modern Language Association (MLA)
"Four-barrel." Sports Illustrated NASCAR Glossary. Sports Illustrated. 22 March. 2023 http://www.expertglossary.com/definition/four-barrel.