Spears, Jamie. "Blavatsky, Helena Petrovna (‘HPB’) (1831–1891)." The Routledge Encyclopedia of Modernism. : Taylor and Francis, 2016. Date Accessed 29 Sep. 2023 https://www.rem.routledge.com/articles/blavatsky-helena-petrovna-hpb-1831-1891. doi:10.4324/9781135000356-REM1544-1
Spears, J.(2016). Blavatsky, Helena Petrovna (‘HPB’) (1831–1891). In The Routledge Encyclopedia of Modernism. : Taylor and Francis. Retrieved 29 Sep. 2023, from https://www.rem.routledge.com/articles/blavatsky-helena-petrovna-hpb-1831-1891. doi:10.4324/9781135000356-REM1544-1
Spears, J. 2016, 'Blavatsky, Helena Petrovna (‘HPB’) (1831–1891)' in Routledge Encyclopedia of Modernism, Taylor and Francis, viewed 29 September 2023, <https://www.rem.routledge.com/articles/blavatsky-helena-petrovna-hpb-1831-1891>. doi:10.4324/9781135000356-REM1544-1