APA (7th ed.) Citation

(1932). Significance of Bureau of Mines approval of gas masks. [publisher not identified].

Chicago Style (17th ed.) Citation

Significance of Bureau of Mines Approval of Gas Masks. Washington, D.C.: [publisher not identified], 1932.

MLA (9th ed.) Citation

Significance of Bureau of Mines Approval of Gas Masks. [publisher not identified], 1932.

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