Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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