APA (7th ed.) Citation

United States. Post Office Department. (1923). Requisitions for special-request envelopes. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Post Office Department. Requisitions for Special-request Envelopes. [Washington]: [publisher not identified], 1923.

MLA (9th ed.) Citation

United States. Post Office Department. Requisitions for Special-request Envelopes. [publisher not identified], 1923.

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