Schmidt, Florian Alexander (2013). "The Good, the Bad and the Ugly: Why Crowdsourcing Needs Ethics". 2013 International Conference on Cloud and Green Computing. pp.531–535. doi:10.1109/CGC.2013.89. ISBN978-0-7695-5114-2. S2CID18798641.
Schmidt, Florian Alexander (2013). "The Good, the Bad and the Ugly: Why Crowdsourcing Needs Ethics". 2013 International Conference on Cloud and Green Computing. pp.531–535. doi:10.1109/CGC.2013.89. ISBN978-0-7695-5114-2. S2CID18798641.
Litman, Leib (2020). Conducting online research on Amazon Mechanical Turk and beyond. Jonathan Robinson (1sted.). Los Angeles. ISBN978-1-5063-9111-3. OCLC1180179545.{{cite book}}: CS1 maint: location missing publisher (link)