Management chronology,第2頁. National Aeronautics and Space Administration. Management Chronology. (exhibit to August 3, 1972, committee hearing). 1972 [2021-07-25]. (原始内容存档于2021-07-25). 含有連結內容需訂閱查看的頁面 (link)
Apollo 15 Stamps(PDF) (新闻稿). NASA. July 11, 1972 [2021-07-25]. (原始内容存档(PDF)于2022-01-12).
Management chronology,第2頁. National Aeronautics and Space Administration. Management Chronology. (exhibit to August 3, 1972, committee hearing). 1972 [2021-07-25]. (原始内容存档于2021-07-25). 含有連結內容需訂閱查看的頁面 (link)