(EN) J. Boone Bartholomees, U.S. Army War College Guide to National Security Issues: Theory of war and strategy, Strategic Studies Institute, 2008, p. 267, ISBN 978-1-58487-451-5. URL consultato il 7 luglio 2022.
«William Blackstone, the father of English Common Law, wrote: "[S]elf defense is justly called the primary law of nature, so it is not, neither can it be in fact, taken away by the laws of society."»