APA (7th ed.) Citation

United States. Postal Service. Free Delivery Division. (1902). Order of Postmaster General: Approved boxes for rural free delivery. publisher not identified].

Chicago Style (17th ed.) Citation

United States. Postal Service. Free Delivery Division. Order of Postmaster General: Approved Boxes for Rural Free Delivery. [S.l.: publisher not identified], 1902.

MLA (9th ed.) Citation

United States. Postal Service. Free Delivery Division. Order of Postmaster General: Approved Boxes for Rural Free Delivery. publisher not identified], 1902.