APA (7th ed.) Citation

Eldridge, G. H., & Emmons, S. F. (1894). Geologic atlas of U.S: Anthracite-Crested Butte folio, Colorado. [publisher not identified].

Chicago Style (17th ed.) Citation

Eldridge, George Homans, and Samuel Franklin Emmons. Geologic Atlas of U.S: Anthracite-Crested Butte Folio, Colorado. Washington, D.C.: [publisher not identified], 1894.

MLA (9th ed.) Citation

Eldridge, George Homans, and Samuel Franklin Emmons. Geologic Atlas of U.S: Anthracite-Crested Butte Folio, Colorado. [publisher not identified], 1894.