APA (7th ed.) Citation

Hotchkiss, W. O. (1932). The story of a billion years. The Williams & Wilkins company in cooperation with the Century of progress exposition.

Chicago Style (17th ed.) Citation

Hotchkiss, William Otis. The Story of a Billion Years. Baltimore: The Williams & Wilkins company in cooperation with the Century of progress exposition, 1932.

MLA (9th ed.) Citation

Hotchkiss, William Otis. The Story of a Billion Years. The Williams & Wilkins company in cooperation with the Century of progress exposition, 1932.