Centre Martin Luther King. Combat Non-Violent. Lausanne: Centre Martin Luther King.
Cita Chicago (17th ed.)Centre Martin Luther King. Combat Non-Violent. Lausanne: Centre Martin Luther King.
Cita MLA (8th ed.)Centre Martin Luther King. Combat Non-Violent. Lausanne: Centre Martin Luther King.
Atenció: Aquestes cites poden no estar 100% correctes.