Heniff Jr., Bill. Basic Federal Budgeting Terminology(PDF). Congressional Research Service. 26 November 2012 [9 January 2014]. (原始内容存档(PDF)于2017-08-08).
Williams, Lynn B.; Heitshusen, Valerie. Defense Primer: Navigating the NDAA(PDF). Washington, DC: Congressional Research Service. November 28, 2016 [11 November 2018]. (原始内容存档(PDF)于2020-08-09).
Heniff Jr., Bill. Basic Federal Budgeting Terminology(PDF). Congressional Research Service. 26 November 2012 [9 January 2014]. (原始内容存档(PDF)于2017-08-08).
Williams, Lynn B.; Heitshusen, Valerie. Defense Primer: Navigating the NDAA(PDF). Washington, DC: Congressional Research Service. November 28, 2016 [11 November 2018]. (原始内容存档(PDF)于2020-08-09).