Cita APA (7a ed.)

Kołakowski, L., & Kołakowska, A. (2008). Why is there something rather than nothing?: Questions from great philosophers. Penguin.

Cita Chicago Style (17a ed.)

Kołakowski, Leszek, y Agnieszka Kołakowska. Why Is There Something Rather than Nothing?: Questions from Great Philosophers. London: Penguin, 2008.

Cita MLA (9a ed.)

Kołakowski, Leszek, y Agnieszka Kołakowska. Why Is There Something Rather than Nothing?: Questions from Great Philosophers. Penguin, 2008.