L.A. fans don't just give their devotion, teams have to earn it - Los Angeles Times
Going gangbusters: NFL attendance has bounced back in a major way, with the highest per-game average in years
Analysis: How the Seahawks missed on Eastern Washington product Cooper Kupp in 2017 draft
History of the National Football League in Los Angeles, American Football Wiki
The North American Soccer Landscape: Our Present. Our Future. - Indomitable City Soccer
Los Angeles Is An NFL Town! It Just Needs Some Football Fans To Move There
The 16 Biggest Story Lines for the 2020 NFL Season - The Ringer
100 Things Oklahoma State Fans Should Know & Do Before They Die (100 Things Fans Should Know): Allen, Robert, Gundy, Mike: 9781629374345: : Books
Robert Baade: Stadium Economics Pioneer
How Popular Is Baseball, Really? - The New York Times