APA (7th ed.) Citation

Kahn, Martel, & Brown. (1977). The next 200 years: A senario for America and the world. Associated Business Programmes.

Chicago Style (17th ed.) Citation

Kahn, Martel, and Brown. The Next 200 Years: A Senario for America and the World. London: Associated Business Programmes, 1977.

MLA (8th ed.) Citation

Kahn, et al. The Next 200 Years: A Senario for America and the World. Associated Business Programmes, 1977.