United States Civil Service Commission. (1921). Instructions to applicants for post-office service, 13th U.S. Civil-Service District, headquarters at Denver, Colo. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States Civil Service Commission. Instructions to Applicants for Post-office Service, 13th U.S. Civil-Service District, Headquarters at Denver, Colo. Washington: [publisher not identified], 1921.
MLA (9th ed.) CitationUnited States Civil Service Commission. Instructions to Applicants for Post-office Service, 13th U.S. Civil-Service District, Headquarters at Denver, Colo. [publisher not identified], 1921.
Warning: These citations may not always be 100% accurate.