APA (7th ed.) Citation

United States. Bureau of Mines. (1924). Underground signalling for mines by ground-conduction or "T.P.S." method. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines. Underground Signalling for Mines by Ground-conduction or "T.P.S." Method. [Washington]: [publisher not identified], 1924.

MLA (9th ed.) Citation

United States. Bureau of Mines. Underground Signalling for Mines by Ground-conduction or "T.P.S." Method. [publisher not identified], 1924.

Warning: These citations may not always be 100% accurate.