APA (7th ed.) Citation

Katz, S. H. (1929). Industrial gas masks abroad. [publisher not identified].

Chicago Style (17th ed.) Citation

Katz, S. H. Industrial Gas Masks Abroad. Washington, D.C.: [publisher not identified], 1929.

MLA (9th ed.) Citation

Katz, S. H. Industrial Gas Masks Abroad. [publisher not identified], 1929.