APA (7th ed.) Citation

(1989). The challengers: A century of ballooning. Hunter.

Chicago Style (17th ed.) Citation

The Challengers: A Century of Ballooning. Phoenix, Ariz: Hunter, 1989.

MLA (9th ed.) Citation

The Challengers: A Century of Ballooning. Hunter, 1989.

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