University of Colorado (Boulder campus). Bureau of Business Research, Colorado Springs Chamber of Commerce, & Crampon, L. J. (1953). The Pikes Peak region as a tourist resort.
Chicago-referens (17:e uppl.)University of Colorado (Boulder campus). Bureau of Business Research, Colorado Springs Chamber of Commerce, och L. J. Crampon. The Pikes Peak Region as a Tourist Resort. Boulder, 1953.
MLA-referens (8:e uppl.)University of Colorado (Boulder campus). Bureau of Business Research, et al. The Pikes Peak Region as a Tourist Resort. 1953.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.