APA (7th ed.) Citation

Comas, J. (1972). Where did the first Americans come from? Antarctica, Siberia or across the Pacific.

Chicago Style (17th ed.) Citation

Comas, Juan. Where Did the First Americans Come from? Antarctica, Siberia or Across the Pacific. 1972.

MLA (9th ed.) Citation

Comas, Juan. Where Did the First Americans Come from? Antarctica, Siberia or Across the Pacific. 1972.

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