"1831---House of Appleton". Major American Publishers. The Hyde Park Book Store. February 7, 2012. Archived from the original on May 19, 2006. Retrieved September 14, 2013.
"1831---House of Appleton". Major American Publishers. The Hyde Park Book Store. February 7, 2012. Archived from the original on May 19, 2006. Retrieved September 14, 2013.