The calendar : the 5000-year struggle to align the clock and the heavens - and what happened to the missing ten days

MLA

Duncan, David Ewing. The Calendar : the 5000-year Struggle to Align the Clock and the Heavens - and What Happened to the Missing Ten Days. London: Fourth Estate, 1999.

APA

Duncan, D. Ewing. (1999). The calendar : the 5000-year struggle to align the clock and the heavens - and what happened to the missing ten days. London: Fourth Estate.

Chicago

Duncan, David Ewing., The Calendar: The 5000-Year Struggle to Align the Clock and the Heavens - and What Happened to the Missing Ten Days. London: Fourth Estate, 1999.