Deismireacht APA

Gilbert,Martin. (1999). Challenge to civilization: A history of the 20th century 1952-1999. Harper Collins.

Chicago Edition Citation

Gilbert,Martin. Challenge to Civilization: A History of the 20th Century 1952-1999. London: Harper Collins, 1999.

Deismireacht MLA

Gilbert,Martin. Challenge to Civilization: A History of the 20th Century 1952-1999. Harper Collins, 1999.

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