Gaya APA

Halpern, P. (2004). The Great beyond : higher dimensions, parallel universes and the extraodninary search for a theory of everything . New Jersey: John Wiley and Sons.

Gaya MLA

Halpern, Paul. "The Great beyond : higher dimensions, parallel universes and the extraodninary search for a theory of everything". New Jersey: John Wiley and Sons, 2004. Text.