APA (7th ed.) Citation

United States. Postmaster General. (1920). Customs declarations required on parcel-post packages for delivery through U.S. postal agency at Shanghai, China. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Postmaster General. Customs Declarations Required on Parcel-post Packages for Delivery Through U.S. Postal Agency at Shanghai, China. Washington: [publisher not identified], 1920.

MLA (9th ed.) Citation

United States. Postmaster General. Customs Declarations Required on Parcel-post Packages for Delivery Through U.S. Postal Agency at Shanghai, China. [publisher not identified], 1920.