Statutes of the Postal International. Adopted at the International Congress held at Berlin, 21 August, 1922. N.pl..
Chicago Style (17th ed.) CitationStatutes of the Postal International. Adopted at the International Congress Held at Berlin, 21 August, 1922. N.pl..
MLA (8th ed.) CitationStatutes of the Postal International. Adopted at the International Congress Held at Berlin, 21 August, 1922. N.pl..
Warning: These citations may not always be 100% accurate.