APA (7th ed.) Citation

Loeb, A., & Petkoff, R. (2021). Extraterrestrial: The first sign of intelligent life beyond earth (Unabridged.). HarperAudio.

Chicago Style (17th ed.) Citation

Loeb, Avi, and Robert Petkoff. Extraterrestrial: The First Sign of Intelligent Life Beyond Earth. Unabridged. New York: HarperAudio, 2021.

MLA (8th ed.) Citation

Loeb, Avi, and Robert Petkoff. Extraterrestrial: The First Sign of Intelligent Life Beyond Earth. Unabridged. HarperAudio, 2021.

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