Sources: Edward Pickering

• "Edward Charles Pickering." NNDB: Tracking the Entire World. Web. 24 Feb. 2011. <http://www.nndb.com/people/940/000100640/>.

• "The Bruce Medalists: Edward C. Pickering." SSU Department of Physics & Astronomy - Home. Web. 24 Feb. 2011. <http://www.phys-astro.sonoma.edu/BruceMedalists/Pickering/index.html>.

• "Biography of Edward Pickering." Page Start-up. Web. 24 Feb. 2011. <http://astronomy.wakaf.net/htm/pickering.htm>

• Miss Leavitt in Pickering, Edward C. "Periods of 25 Variable Stars in the Small Magellanic Cloud" Harvard College Observatory Circular 173 (1912) 1-3.