Percy, W. (2000). Lost in the cosmos: The last self-help book. Picador USA.
Cita Chicago Style (17a ed.)Percy, Walker. Lost in the Cosmos: The Last Self-help Book. New York: Picador USA, 2000.
Cita MLA (8a ed.)Percy, Walker. Lost in the Cosmos: The Last Self-help Book. Picador USA, 2000.
Precaución: Estas citas no son 100% exactas.