APA (7th ed.) Citation

Smithsonian Institution. (1916). Cambrian geology and paleontology, III: No. 4, Relations between Cambrian and pre-Cambrian formations in vicinity of Helena, Mont. [publisher not identified].

Chicago Style (17th ed.) Citation

Smithsonian Institution. Cambrian Geology and Paleontology, III: No. 4, Relations Between Cambrian and Pre-Cambrian Formations in Vicinity of Helena, Mont. [Washington]: [publisher not identified], 1916.

MLA (9th ed.) Citation

Smithsonian Institution. Cambrian Geology and Paleontology, III: No. 4, Relations Between Cambrian and Pre-Cambrian Formations in Vicinity of Helena, Mont. [publisher not identified], 1916.