APA (7th ed.) Citation

Asimov, I., & Fass, R. (2009). Pebble in the sky. BBC Audiobooks America.

Chicago Style (17th ed.) Citation

Asimov, Isaac, and Robert Fass. Pebble in the Sky. North Kingstown, R.I.: BBC Audiobooks America, 2009.

MLA (8th ed.) Citation

Asimov, Isaac, and Robert Fass. Pebble in the Sky. BBC Audiobooks America, 2009.

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