Παραπομπή APA

John R Gribbin. (2008). The universe: A Biography. Penguin Books.

Παραπομπή Chicago Style

John R Gribbin. The Universe: A Biography. London: Penguin Books, 2008.

Παραπομπή MLA

John R Gribbin. The Universe: A Biography. Penguin Books, 2008.