'Marks, Sidney Algernon (1858–1947)', People Australia, National Centre of Biography, Australian National University, https://peopleaustralia.anu.edu.au/biography/marks-sidney-algernon-21133/text, accessed 2 May 2025.
6 May,
1858
North Adelaide, Adelaide,
South Australia,
Australia
16 November,
1947
(aged 89)
Armadale, Melbourne,
Victoria,
Australia
Includes the religion in which subjects were raised, have chosen themselves, attendance at religious schools and/or religious funeral rites; Atheism and Agnosticism have been included.