Federal Reserve Bank of Atlanta and Federal Reserve Bank of Boston. "2011 Survey of Consumer Payment Choice : 2011 Survey Questionnaire" in Survey and Diary of Consumer Payment Choice ([Revised September 2014]). https://fraser.stlouisfed.org/title/7178/item/682167/content/pdf/frbatl_2011survey_scpc2011survey-instrument, accessed on February 19, 2026.