Source: https://www.amazon.co.uk/Art-Theory-1900-2000-Anthology-Changing/dp/0631227083/ref=pd_cp_14_3?_encoding=UTF8&pd_rd_i=0631227083&pd_rd_r=D6J8RA29T03SWF0KM720&pd_rd_w=mqp4Z&pd_rd_wg=s8mb4&psc=1&refRID=D6J8RA29T03SWF0KM720