Alexander, E. (2012). Proof of heaven: A neurosurgeon's journey into the afterlife.
Cita Chicago Style (17a ed.)Alexander, Eben. Proof of Heaven: A Neurosurgeon's Journey into the Afterlife. 2012.
Cita MLA (8a ed.)Alexander, Eben. Proof of Heaven: A Neurosurgeon's Journey into the Afterlife. 2012.
Precaución: Estas citas no son 100% exactas.