Shade Sail Area - Math bibliographies - in Harvard style

In-text: (2018)

Your Bibliography: 2018. [online] Available at: <http://www.chegg.com/homework-help/definitions/simpsons-rule-29> [Accessed 21 May 2018].

In-text: (Angular Size | Imaging the Universe, 2017)

Your Bibliography: Astro.physics.uiowa.edu. 2017. Angular Size | Imaging the Universe. [online] Available at: <http://astro.physics.uiowa.edu/ITU/labs/foundational-labs/angular-size/> [Accessed 25 May 2018].

In-text: (2018)

Your Bibliography: Pages.pacificcoast.net. 2018. [online] Available at: <http://pages.pacificcoast.net/~cazelais/187/simpson.pdf> [Accessed 21 May 2018].

In-text: (Weisstein, 2018)

Your Bibliography: Weisstein, E., 2018. Simpson's Rule -- from Wolfram MathWorld. [online] Mathworld.wolfram.com. Available at: <http://mathworld.wolfram.com/SimpsonsRule.html> [Accessed 26 May 2018].