Clark, M. (1997). Reason to believe: A practical guide to psychic phenomena. Avon Books.
Citazione stile Chigago Style (17a edizione)Clark, Michael. Reason to Believe: A Practical Guide to Psychic Phenomena. New York: Avon Books, 1997.
Citatione MLA (9a ed.)Clark, Michael. Reason to Believe: A Practical Guide to Psychic Phenomena. Avon Books, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.