APA (7th ed.) Citation

Metzger, O. H. (1940). Aerial tramways in the metal-mining industry. United States Bureau of Mines. Information Circular, 7095, 1.

Chicago Style (17th ed.) Citation

Metzger, O. H. "Aerial Tramways in the Metal-mining Industry." United States Bureau of Mines. Information Circular 7095 (1940): 1.

MLA (9th ed.) Citation

Metzger, O. H. "Aerial Tramways in the Metal-mining Industry." United States Bureau of Mines. Information Circular, vol. 7095, 1940, p. 1.