APA (7th ed.) Citation

Doerner, H. A. (1931). Reduction of zinc oxide by methane or natural gas. [publisher not identified].

Chicago Style (17th ed.) Citation

Doerner, H. A. Reduction of Zinc Oxide by Methane or Natural Gas. Washington, D.C.: [publisher not identified], 1931.

MLA (9th ed.) Citation

Doerner, H. A. Reduction of Zinc Oxide by Methane or Natural Gas. [publisher not identified], 1931.