APA (7th ed.) Citation

(1927). Purchase of nitrous oxide, oxygen, and ethylene gases. [publisher not identified].

Chicago Style (17th ed.) Citation

Purchase of Nitrous Oxide, Oxygen, and Ethylene Gases. Washington, D.C.: [publisher not identified], 1927.

MLA (9th ed.) Citation

Purchase of Nitrous Oxide, Oxygen, and Ethylene Gases. [publisher not identified], 1927.