Bergstrom, Bradley J.; Hoffmann, Robert S. (1991). "Distribution and Diagnosis of Three Species of Chipmunks (Tamias) in the Front Range of Colorado". The Southwestern Naturalist. 36 (1): 14. doi:10.2307/3672112. ISSN0038-4909. JSTOR3672112.
Bergstrom, Bradley J.; Hoffmann, Robert S. (1991). "Distribution and Diagnosis of Three Species of Chipmunks (Tamias) in the Front Range of Colorado". The Southwestern Naturalist. 36 (1): 14. doi:10.2307/3672112. ISSN0038-4909. JSTOR3672112.
Bergstrom, Bradley J.; Hoffmann, Robert S. (1991). "Distribution and Diagnosis of Three Species of Chipmunks (Tamias) in the Front Range of Colorado". The Southwestern Naturalist. 36 (1): 14. doi:10.2307/3672112. ISSN0038-4909. JSTOR3672112.