APA (7th ed.) Citation

United States. Postmaster General. (1924). Precautions to be taken in storing stamped envelopes. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Postmaster General. Precautions to Be Taken in Storing Stamped Envelopes. Washington: [publisher not identified], 1924.

MLA (9th ed.) Citation

United States. Postmaster General. Precautions to Be Taken in Storing Stamped Envelopes. [publisher not identified], 1924.

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