Rujukan

WikiPedia: Norman Angell http://www.bsu.edu/libraries/archives/findingaids/... http://socialarchive.iath.virginia.edu/ark:/99166/... http://aleph.nli.org.il/F/?func=find-b&local_base=... http://data.bibliotheken.nl/id/thes/p072789018 //archive.org/search.php?query=((subject:%22Angell... http://ia600408.us.archive.org/3/items/PeaceTheori... http://www.gutenberg.org/author/Angell,+Norman http://isni.org/isni/0000000122798410 http://librivox.org/author/8768 http://nobelprize.org/nobel_prizes/peace/laureates...