APA (7th ed.) Citation

United States. Postmaster General. (1924). Apartment house mail receptacles. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Postmaster General. Apartment House Mail Receptacles. Washington: [publisher not identified], 1924.

MLA (9th ed.) Citation

United States. Postmaster General. Apartment House Mail Receptacles. [publisher not identified], 1924.

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