Merriam-Webster's Geographical Dictionary. 3. vyd. Springfield, Massachusetts, U. S. A.: Merriam-Webster, Incorporporated, Publishers, 1997. 1361 s. Dostupné online. ISBN0-87779-546-0. S. 437. (anglicky)
arizona.edu
mgio.arizona.edu
Mount Graham International Observatory. An Astrophysical Research Site [online]. The University of Arizona [cit. 2020-09-06]. Dostupné online. (angličtina)
peakbagger.com
Mount Graham, Arizona [online]. Peakbagger.com [cit. 2019-09-06]. Dostupné online. (anglicky)