^Halliwell, Martin; Catherine Morley (2008). American Thought and Culture in the 21st Century. Edinburgh University Press. pp. 9–10. ISBN978-0748626021.
^Aldrich, Robert (1996). Greater France: A History of French Overseas Expansion. p. 304.
^An Era of Darkness: The British Empire in India. Aleph Book Company. 2016. ISBN978-9383064656.
^"ADFQtcg.png". Glavkon Struktor. Archived from the original on 31 December 2021. Retrieved 5 July 2021.
^Data Source: Tables of Prof. Angus Maddison (2010). The per capita GDP over various years and population data can be downloaded in a spreadsheet from here.