United States. Office of the First Assistant Postmaster General. (1909). Instructions relative to efficiency records of post office clerks and city letter carriers, 2nd edition. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Office of the First Assistant Postmaster General. Instructions Relative to Efficiency Records of Post Office Clerks and City Letter Carriers, 2nd Edition. [Washington]: [publisher not identified], 1909.
MLA (9th ed.) CitationUnited States. Office of the First Assistant Postmaster General. Instructions Relative to Efficiency Records of Post Office Clerks and City Letter Carriers, 2nd Edition. [publisher not identified], 1909.
Warning: These citations may not always be 100% accurate.