APA-viite

Alvarez, L. W. (1983). Experimental evidence that an asteroid impact led to the extinction of many species 65 million years ago.

Chicago-tyylinen lähdeviittaus

Alvarez, Luis W. Experimental Evidence That an Asteroid Impact Led to the Extinction of Many Species 65 Million Years Ago. 1983.

MLA-viite

Alvarez, Luis W. Experimental Evidence That an Asteroid Impact Led to the Extinction of Many Species 65 Million Years Ago. 1983.

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