War Resisters League (WRL). Nonviolent activist. New York: WRL.
Cita Chicago (17th ed.)War Resisters League (WRL). Nonviolent Activist. New York: WRL.
Cita MLA (8th ed.)War Resisters League (WRL). Nonviolent Activist. New York: WRL.
Atenció: Aquestes cites poden no estar 100% correctes.