Routledge,7 Oxford University Press,6 Cambridge University Press,5 McGraw-Hill,5 Springer New York Dordrecht Heidelberg,3 Core Knowledge Foundation,3 Continuum International Publishing Group,2 Mc Graw Hill,2 Bantam Books,2 Simon & Schuster,2 Learning Express,2 Dover Publications,2 Penguin Group,2 Basic Books,2 Scribner,2 Routledge Taylor & Francis Group,1 The International Debate Education Association,1 McGraw-Hill Companies, Inc.,1 HOUGHTON MIFFLIN HARCOURT,1 Center Street Hachette Book Group,1