Secession(1st Edition) (Hyperbole Books Bi Sheng/Juan Pablos Digitovisuo Artifacts Series, Volume I) by Amy Sara Carroll, William Anthony Nericcio, Holly Hughes Paperback, 189 Pages, Published 2012 by San Diego State University Press (Hyperbole Books) ISBN-13: 978-1-879691-96-4, ISBN: 1-879691-96-5
Llawlyfr Astudio Gwyddoniaeth Gwyddoniaeth Cyfnod Allweddol 2 -: Y Llyfr Astudio by Caroll Hughes, Richard Parsons, Caa Staff Paperback, 108 Pages, Published 2008 by Centre For Educational Studies, University Of Wales ISBN-13: 978-1-85644-579-5, ISBN: 1-85644-579-8