APA (7th ed.) Citation

Björnsson, H. (2011). A world without ice. Arctic Portal.

Chicago Style (17th ed.) Citation

Björnsson, Helgi. A World Without Ice. Arctic Portal, 2011.

MLA (9th ed.) Citation

Björnsson, Helgi. A World Without Ice. Arctic Portal, 2011.

Warning: These citations may not always be 100% accurate.