Science - Earth Sciences bibliographies - in Harvard style

In-text: (Overview of Acids and Bases, 2018)

Your Bibliography: Chemistry LibreTexts. 2018. Overview of Acids and Bases. [online] Available at: <https://chem.libretexts.org/Core/Physical_and_Theoretical_Chemistry/Acids_and_Bases/Acid/Overview_of_Acids_and_Bases> [Accessed 23 May 2018].

In-text: (Overview of Acids and Bases, 2018)

Your Bibliography: Chemistry LibreTexts. 2018. Overview of Acids and Bases. [online] Available at: <https://chem.libretexts.org/Core/Physical_and_Theoretical_Chemistry/Acids_and_Bases/Acid/Overview_of_Acids_and_Bases> [Accessed 31 May 2018].

In-text: (Acids and Bases | Boundless Chemistry, 2018)

Your Bibliography: Courses.lumenlearning.com. 2018. Acids and Bases | Boundless Chemistry. [online] Available at: <https://courses.lumenlearning.com/boundless-chemistry/chapter/acids-and-bases/> [Accessed 23 May 2018].

In-text: (Acid vs Base - Difference and Comparison | Diffen, 2018)

Your Bibliography: Diffen.com. 2018. Acid vs Base - Difference and Comparison | Diffen. [online] Available at: <https://www.diffen.com/difference/Acid_vs_Base> [Accessed 23 May 2018].

In-text: (Acids and Bases | Wyzant Resources, 2018)

Your Bibliography: Wyzant.com. 2018. Acids and Bases | Wyzant Resources. [online] Available at: <https://www.wyzant.com/resources/lessons/science/chemistry/acids-and-bases> [Accessed 23 May 2018].