APA (7th ed.) Citation

Loeb, A. (2021). Extraterrestrial: The first sign of intelligent life beyond Earth. Houghton Mifflin Harcourt.

Chicago Style (17th ed.) Citation

Loeb, Abraham. Extraterrestrial: The First Sign of Intelligent Life Beyond Earth. Boston: Houghton Mifflin Harcourt, 2021.

MLA (8th ed.) Citation

Loeb, Abraham. Extraterrestrial: The First Sign of Intelligent Life Beyond Earth. Houghton Mifflin Harcourt, 2021.

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