Preston, D. J. (2010). Impact (Center Point large print ed.). Center Point Pub..
Cita Chicago Style (17a ed.)Preston, Douglas J. Impact. Center Point large print ed. Thorndike, Me.: Center Point Pub., 2010.
Cita MLA (8a ed.)Preston, Douglas J. Impact. Center Point large print ed. Center Point Pub., 2010.
Precaución: Estas citas no son 100% exactas.