Trích dẫn APA

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

Trích dẫn kiểu Chicago

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

Trích dẫn MLA

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

Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.