APA-čujuhus (7. p.)
Ward, P. D., & Brownlee, D. Rare Earth: Why complex life is uncommon in the Universe. Copernicus.
Chicago-čujuhus (17. p.)
Ward, Peter D., juo Donald Brownlee. Rare Earth: Why Complex Life Is Uncommon in the Universe. Nueva York, EUA: Copernicus.
MLA-čujuhus (9. p.)
Ward, Peter D., juo Donald Brownlee. Rare Earth: Why Complex Life Is Uncommon in the Universe. Copernicus.
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