Цивилизација — разлика између измена

* {{Cite book|ref=harv | last=Thomas| first = Hugh |authorlink = Hugh Thomas (historian) |year=1981| title = An Unfinished History of the World | edition = rev. | publisher = Pan | location = London |isbn=978-0-330-26458-7|pages=}}

* {{Cite book|ref=harv | last=Yap| first = Yong | last2=Cotterell| first2 = Arthur|year=1975| title = The Early Civilization of China| publisher = Putnam | location = New York |isbn=978-0-399-11595-0|pages=}}

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