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