APA Citation

Brownlee, P. D. W. a. D. Rare earth why complex life is uncommon in the universe. Copernicus.

Chicago Style Citation

Brownlee, Peter D. Ward and Donald. Rare Earth Why Complex Life Is Uncommon in the Universe. Copernicus.

MLA Citation

Brownlee, Peter D. Ward and Donald. Rare Earth Why Complex Life Is Uncommon in the Universe. Copernicus.

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