↑ Hoe, Susanna; Roebuck, Derek (1999). The Taking of Hong Kong: Charles and Clara Elliot in China Waters. Routledge. p. 203. ISBN 0700711457.
↑ John Darwin, 'After Tamerlane: The Global History of Empire', p.431. (London: Allen Lane, 2007)
1 2 Martin, Robert Montgomery (1847). China: Political, Commercial, and Social; In an Official Report to Her Majesty's Government. Volume 2. James Madden. p. 84.
