APA (7th ed.) Citation

Heppenheimer, T. A. (1997). Countdown : a history of space flight / T.A. Heppenheimer: A history of space flight. Wiley.

Chicago Style (17th ed.) Citation

Heppenheimer, T. A. Countdown : A History of Space Flight / T.A. Heppenheimer: A History of Space Flight. New York: Wiley, 1997.

MLA (9th ed.) Citation

Heppenheimer, T. A. Countdown : A History of Space Flight / T.A. Heppenheimer: A History of Space Flight. Wiley, 1997.

Warning: These citations may not always be 100% accurate.