Fletcher, G. P. Defending humanity: When force is justified and why. Oxford University Press.
Citazione stile Chigago Style (17a edizione)Fletcher, George P. Defending Humanity: When Force Is Justified and Why. Oxford: Oxford University Press.
Citatione MLA (9a ed.)Fletcher, George P. Defending Humanity: When Force Is Justified and Why. Oxford University Press.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.