Gaya APA

Alexander, ., Alexander, E. (2012). E-book Proof of Heaven: A Neurosurgeon's Journey into the Afterlife . : Simon & Schuster.

Gaya MLA

Alexander, ., Alexander, Eben. "E-book Proof of Heaven: A Neurosurgeon's Journey into the Afterlife". : Simon & Schuster, 2012. Text.