Arsenic - Earth Sciences bibliographies - in Harvard style

In-text: (Elements, n.d.)

Your Bibliography: Elements, P., n.d. Arsenic | Minerals Education Coalition. [online] Minerals Education Coalition. Available at: <https://mineralseducationcoalition.org/elements/arsenic/#:~:text=Common%20arsenic%2Dbearing%20minerals%20include,%2C%20Mexico%2C%20and%20the%20Philippines.> [Accessed 7 June 2021].

In-text: (smelting | Definition & Facts, n.d.)

Your Bibliography: Encyclopedia Britannica. n.d. smelting | Definition & Facts. [online] Available at: <https://www.britannica.com/technology/smelting> [Accessed 7 June 2021].

In-text: (Arsenic, n.d.)

Your Bibliography: Greenfacts.org. n.d. Arsenic. [online] Available at: <https://www.greenfacts.org/en/arsenic/index.htm> [Accessed 7 June 2021].

In-text: (Arsenic, n.d.)

Your Bibliography: National Institute of Environmental Health Sciences. n.d. Arsenic. [online] Available at: <https://www.niehs.nih.gov/health/topics/agents/arsenic/index.cfm> [Accessed 7 June 2021].