NFL's national anthem policy: Players on field must stand, show 'respect'
How high school football coaches plan to handle national anthem protests
The national anthem in sports (spoiler: it wasn't always this way)
NFL owners approve policy for kneeling players
New NFL Anthem Policy Adopted; Teams Fined For Protesting Players
The Kaepernick Effect: Protests, Across the NFL and Beyond, in Response to Trump - The Atlantic
National anthem protests: NFL owners consider new rule - Sports Illustrated
NFL bans on-field kneeling during the national anthem
Kneeling for the National Anthem isn't disrespect. Sitting would be.
The NFL Has Done The Allowed Thing, Now They Must Do The Right Thing!!! - ISAAC NEWTON FARRIS JR
NFL adopts policy to fine teams if players and personnel don't stand for national anthem
NFL teams face fines over national anthem protests under new policy - The Boston Globe
NFL players kneel for anthem in unprecedented defiance of Trump, Donald Trump