Annie Jump Cannon, article, Encyclopædia Britannica Online, accessed September 12, 2008.
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Nesterov, V. V.; Kuzmin, A. V.; Ashimbaeva, N. T.; Volchkov, A. A.; Röser, S.; Bastian, U. (1995). "The Henry Draper Extension Charts: A catalogue of accurate positions, proper motions, magnitudes and spectral types of 86933 stars". Astronomy and Astrophysics Supplement Series. 110: 367. Bibcode:1995A&AS..110..367N. CDS ID III/182.
Cannon, Annie. J. (1936). "The Henry Draper extension". Annals of Harvard College Observatory. 100: 1. Bibcode:1936AnHar.100....1C.
Cannon, Annie J. (1915). "The Henry Draper Memorial". Journal of the Royal Astronomical Society of Canada. 9: 203. Bibcode:1915JRASC...9..203C.
Pickering, Edward C. (1890). "The Draper Catalogue of stellar spectra photographed with the 8-inch Bache telescope as a part of the Henry Draper memorial". Annals of Harvard College Observatory. 27: 1–388. Bibcode:1890AnHar..27....1P. See in particular pp. 1–2.
Maury, Antonia C.; Pickering, Edward C. (1897). "Spectra of bright stars photographed with the 11-inch Draper Telescope as part of the Henry Draper Memorial". Annals of Harvard College Observatory. 28: 1. Bibcode:1897AnHar..28....1M.
Cannon, Annie J.; Pickering, Edward C. (1901). "Spectra of bright southern stars photographed with the 13-inch Boyden telescope as part of the Henry Draper Memorial". Annals of Harvard College Observatory. 28: 129. Bibcode:1901AnHar..28..129C.
Cannon, Annie Jump; Shapley, Harlow (1937). "The Henry Draper charts of stellar spectra". Annals of Harvard College Observatory. 105 (1): 1. Bibcode:1937AnHar.105....1C.
Cannon, Annie J.; Mayall, Margaret Walton (1949). "The Henry Draper extension. II". Annals of Harvard College Observatory. 112: 1. Bibcode:1949AnHar.112....1C.
Nesterov, V. V.; Kuzmin, A. V.; Ashimbaeva, N. T.; Volchkov, A. A.; Röser, S.; Bastian, U. (1995). "The Henry Draper Extension Charts: A catalogue of accurate positions, proper motions, magnitudes and spectral types of 86933 stars". Astronomy and Astrophysics Supplement Series. 110: 367. Bibcode:1995A&AS..110..367N. CDS ID III/182.
Henry Draper Catalogue and Extension, A. J. Cannon and E. C. Pickering, CDS ID III/135A.