APA (7th ed.) Citation

Barnard, J. D. (1967). Science: A key to the future. Macmillan.

Chicago Style (17th ed.) Citation

Barnard, J. Darrell. Science: A Key to the Future. New York: Macmillan, 1967.

MLA (9th ed.) Citation

Barnard, J. Darrell. Science: A Key to the Future. Macmillan, 1967.