APA (7th ed.) Citation

Barnard, J. D. (1962). Science: A key to the future. Macmillan.

Chicago Style (17th ed.) Citation

Barnard, John Darrell. Science: A Key to the Future. New York [u.a.]: Macmillan, 1962.

MLA (9th ed.) Citation

Barnard, John Darrell. Science: A Key to the Future. Macmillan, 1962.