Frossard, 1891,第231頁. Frossard, Edouard. Alfred Trumble , 编. The U.S. Mint Collection. The Collector (New York, New York). 1891-10-01, II (19) [2020-11-10]. (原始内容存档于2020-11-16).
Nexsen, 1891,第98頁. Nexsen, John A. The 1804 Dollar. American Journal of Numismatics (Boston, Massachusetts: Boston Numismatic Society). 1891, XXV [2020-11-10]. (原始内容存档于2020-11-09).
Nexsen, 1905,第102頁. Nexsen, John A. The 1804 Dollar. American Journal of Numismatics (Boston, Massachusetts: Boston Numismatic Society). 1905, XXXIX [2020-11-10]. (原始内容存档于2020-11-09).
Trumble 1892,第90頁. Trumble, Alfred (编). That 1804 Dollar. The Art Collector (New York, New York). 1892-01-15, III (6) [2020-11-10]. (原始内容存档于2021-09-07).
Frossard, 1891,第231頁. Frossard, Edouard. Alfred Trumble , 编. The U.S. Mint Collection. The Collector (New York, New York). 1891-10-01, II (19) [2020-11-10]. (原始内容存档于2020-11-16).
Nexsen, 1891,第98頁. Nexsen, John A. The 1804 Dollar. American Journal of Numismatics (Boston, Massachusetts: Boston Numismatic Society). 1891, XXV [2020-11-10]. (原始内容存档于2020-11-09).
Nexsen, 1905,第102頁. Nexsen, John A. The 1804 Dollar. American Journal of Numismatics (Boston, Massachusetts: Boston Numismatic Society). 1905, XXXIX [2020-11-10]. (原始内容存档于2020-11-09).
Trumble 1892,第90頁. Trumble, Alfred (编). That 1804 Dollar. The Art Collector (New York, New York). 1892-01-15, III (6) [2020-11-10]. (原始内容存档于2021-09-07).