Source: https://www.amazon.com/Glenn-Ligon-AMERICA-Whitney-American/dp/0300168470/ref=as_li_ss_tl?s=books&ie=UTF8&qid=1520137330&sr=1-6&keywords=glenn+ligon&linkCode=sl1&tag=culturetype-20&linkId=942721aaddf359153f7be0d22c58291d