Library of Congress. Legislative Reference Service & ProQuest (Firm). (1969). Two Proposals for Increasing Efficiency of Postal Service in the United States: A Brief Survey. [publisher not identified].
Chicago Style (17th ed.) CitationLibrary of Congress. Legislative Reference Service and ProQuest (Firm). Two Proposals for Increasing Efficiency of Postal Service in the United States: A Brief Survey. [Place of publication not identified]: [publisher not identified], 1969.
MLA (9th ed.) CitationLibrary of Congress. Legislative Reference Service and ProQuest (Firm). Two Proposals for Increasing Efficiency of Postal Service in the United States: A Brief Survey. [publisher not identified], 1969.
Warning: These citations may not always be 100% accurate.