APA (7th ed.) Citation

Kahn, H., Brown, W. M., & Martel, L. (1976). The next 200 years: A scenario for America and the world. Morrow.

Chicago Style (17th ed.) Citation

Kahn, Herman, William Morle Brown, and Leon Martel. The Next 200 Years: A Scenario for America and the World. New York: Morrow, 1976.

MLA (8th ed.) Citation

Kahn, Herman, et al. The Next 200 Years: A Scenario for America and the World. Morrow, 1976.