APA (7th ed.) Citation

Churchill, W. (1905). The roundel problem: Presented at the Ninth Annual Meeting of The Railway Signal Association, held at Niagara Falls, N.Y., October 10-12, 1905. [Verlag nicht ermittelbar].

Chicago Style (17th ed.) Citation

Churchill, William. The Roundel Problem: Presented at the Ninth Annual Meeting of The Railway Signal Association, Held at Niagara Falls, N.Y., October 10-12, 1905. [Corning, N.Y.]: [Verlag nicht ermittelbar], 1905.

MLA (9th ed.) Citation

Churchill, William. The Roundel Problem: Presented at the Ninth Annual Meeting of The Railway Signal Association, Held at Niagara Falls, N.Y., October 10-12, 1905. [Verlag nicht ermittelbar], 1905.