एपीए उद्धरण

Kolakowski, L. (2008). Why is there something rather than nothing: Questions from great philosophers. Penguin Books.

शिकागो स्टाइल उद्धरण

Kolakowski, Leszek. Why Is There Something Rather than Nothing: Questions from Great Philosophers. London: Penguin Books, 2008.

एमएलए उद्धरण

Kolakowski, Leszek. Why Is There Something Rather than Nothing: Questions from Great Philosophers. Penguin Books, 2008.