Abrams, M. H. (2000): . New York: W. W. Norton & Company, Inc.. ISBN 0-393-97568-1. Davies, Hunter (2009): , Frances Lincoln Ltd, London, ISBN 978-0-7112-3045-3 Gill, Stephen (2000): . New York: Oxford University Press, Inc.. ISBN 0-19-284044-4. Gill, Stephen (1989): , Oxford University Press, ISBN 978-0192827470 Mason, Emma (2010): , Cambridge University Press Moorman, Mary (1957): , bind 1, Oxford University Press, ISBN 978-0198115656 Moorman, Mary (1965): , bind 2, Oxford University Press, ISBN 978-0198116172 Tewari, M.R. (1983): , New Delhi: S. Chand & Company Ltd.