"1965: Fiction". 20th-Century American Bestsellers. University of Virginia. 2016. Archived from the original on 12 January 2017. Retrieved 10 February 2017.
"1968: Fiction". 20th-Century American Bestsellers. University of Virginia. 2016. Archived from the original on 12 January 2017. Retrieved 10 February 2017.
"1971: Fiction". 20th-Century American Bestsellers. University of Virginia. 2016. Retrieved 10 February 2017.
"1965: Fiction". 20th-Century American Bestsellers. University of Virginia. 2016. Archived from the original on 12 January 2017. Retrieved 10 February 2017.
"1968: Fiction". 20th-Century American Bestsellers. University of Virginia. 2016. Archived from the original on 12 January 2017. Retrieved 10 February 2017.