APA (7th ed.) Citation

Smil, V. (2005). The Next 50 Years: Unfolding Trends. Population and development review, 31(4), 605-643. https://doi.org/10.1111/j.1728-4457.2005.00091.x

Chicago Style (17th ed.) Citation

Smil, Vaclav. "The Next 50 Years: Unfolding Trends." Population and Development Review 31, no. 4 (2005): 605-643. https://doi.org/10.1111/j.1728-4457.2005.00091.x.

MLA (9th ed.) Citation

Smil, Vaclav. "The Next 50 Years: Unfolding Trends." Population and Development Review, vol. 31, no. 4, 2005, pp. 605-643, https://doi.org/10.1111/j.1728-4457.2005.00091.x.