You will need to reference your image sources in your work in a list of figures in numerical order. Using the examples below, your list of image sources would look like this:
Figure 1. Valentino (2019) Paris Haute Couture Autumn/Winter 2019 women. WGSN [Online]. Available from: https://www-wgsn-com.%20/catwalk_gallery/#gender=2&season=0&city=0&show=55896. [Accessed 6th April 2019]
Figure 2. Zara (2019) Printed dress. Zara [Online]. Available from: https://www.zara.com/uk/en/printed-dress-p04886058.html?v1=14694309&v2=1143013 [Accessed 3rd July 2019]
Figure 3. Roach, M. (2003) Dr. Martens : the story of an icon [Photograph]. London: Anova Books, p.138
There are Harvard Referencing Guides available for you.