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==Sách và tạp chí tham khảo==
*{{citechú journalthích tạp chí|author= Zahnel K.|title= Decline and Fall of the Martian Empire|journal= Nature| volume=412 | pages=209–213 | year=2001| doi= 10.1038/35084148|pmid= 11449281|issue= 6843}}
*{{citechú journalthích tạp chí |title= Percival Lowell and the history of Mars |author= Crossley R.|
journal= Massachusetts Review|volume= 41| pages=297–318 |year=2000 |issue= 3}}
*{{citechú journalthích tạp chí |title= Lowell, Percival, Pickering, W. H. and the founding of the Lowell Observatory |author= Strauss D.|journal= Annals of Science|volume= 51 |issue=1 | pages=37–58 |year=1994|doi =10.1080/00033799400200121}}
*{{citechú journalthích tạp chí |title= Turn-of-the-Century American Astronomer Lowell, Percival |author= Trefil J.|journal = Smithsonian|volume= 18 |issue=10| pages=34– |year=1988 }}
*{{citechú journalthích tạp chí |title= Life on Mars is almost Certain + Lowell,Percival on Exobiology |author= Meyer W. B.|journal= American Heritage| volume=35|issue= 2 | pages=38–43 |year=1984 }}
*{{citechú journalthích tạp chí |title= Lowell, Percival – Professional Scientist or Interloper |author= Hetherington N. S.|journal= Journal of the History of Ideas|volume= 42|issue= 1 | pages=159–161 |year=1981 | doi = 10.2307/2709423 |jstor= 2709423}}
*{{citechú journalthích tạp chí |title= Lowell, Percival and the Debate over Extraterrestrial Life |author= Heffernan W. C.|journal= Journal of the History of Ideas |volume= 42|issue= 3| pages=527–530 |year=1981 | doi = 10.2307/2709191 | jstor= 2709191}}
*{{citechú journalthích tạp chí |title=The Planet Mars and Science in Victorian America|
author= Webb G. E.|journal= Journal of American Culture|volume= 3| pages= 573 |year= 1980|doi= 10.1111/j.1542-734X.1980.0304_573.x|issue= 4}}
*{{citechú journalthích tạp chí |title= Lowell and Mars|author1= Hoyt W. G. | author2=Wesley W. G. |journal= American Journal of Physics |year= 1977 | volume= 45|issue= 3|pages= 316–317|doi= 10.1119/1.10630 |bibcode = 1977AmJPh..45..316H }}
*{{citechú journalthích tạp chí |title= Percival Lowell and the Canals of Mars |author= Hofling C. K.|journal=British Journal of Medical Psychology|volume= 37|issue=1 | pages=33–42 |year=1964 |doi= 10.1111/j.2044-8341.1964.tb01304.x }}
{{sơ khai nhân vật Hoa Kỳ}}
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