APA ציטוט

Smil, V. A. (2008). Global catastrophes and trends: The next 50 years.

Chicago Edition Citation

Smil, Vaclav; Author. Global Catastrophes and Trends: The Next 50 Years. Massachusetts, The MIT Press, 2008.

ציטוט MLA

Smil, Vaclav; Author. Global Catastrophes and Trends: The Next 50 Years. 2008.