1. European Commission. (2020). Citizen science. Policy. 〈https://ec.europa.eu/digital-single-market/en/citizen-science〉.
2. What is citizen science? The challenges of definition;Haklay;Sci. Citiz. Sci.,2021
3. National Geographic. Citizen science. Resource Library. Encyclopedic Entry. 〈https://www.nationalgeographic.org/encyclopedia/citizen-science/〉.
4. United States Environmental Protection Agency. Basic Information about Citizen Science. 〈https://www.epa.gov/citizen-science/basic-information-about-citizen-science-0〉.
5. Grey, F., Wyler, D., Fröhlich, J., Maes, K. (2016). Citizen science at universities: Trends, guidelines and recommendations. 〈https://www.leru.org/files/Citizen-Science-at-Universities-Trends-Guidelines-and-Recommendations-Full-paper.pdf〉.