Παραπομπή APA

Kahn, H., & Brown, W. M. (1977). The Next 200 years: A Scenario for America and the World.

Παραπομπή Chicago Style

Kahn, Herman, και William Marte Brown. The Next 200 Years: A Scenario for America and the World. London, 1977.

Παραπομπή MLA

Kahn, Herman, και William Marte Brown. The Next 200 Years: A Scenario for America and the World. 1977.