Цивилизација — разлика између измена

* {{Cite book | ref = harv | last = Jensen| first = Derrick | authorlink = Derrick Jensen | year = 2006| title = [[Endgame (Derrick Jensen books)|Endgame]] | publisher = [[Seven Stories Press]] | location = New York |isbn=978-1-58322-730-5}}

* {{Cite book | ref = harv | last = Keppie| first = Lawrence | year = 1984| title = The Making of the Roman Army: From Republic to Empire | publisher = Barnes & Noble | location = Totowa, N.J. |isbn=978-0-389-20447-3}}

* [[Nikolay Kradin|Kradin, Nikolay]]. Archaeological Criteria of Civilization. ''[[Social Evolution & History]]'', Vol. 5, No 1 (2006): 89–108. {{ISSN|1681-4363}}.

* {{Cite book | ref = harv | last = Lansing| first = Elizabeth | year = 1971| title = The Sumerians: Inventors and Builders | publisher = McGraw-Hill | location = New York |isbn=978-0-07-036357-1}}