U. S. Library of Congress. Catalog Division. (1925). Subject headings with local subdivisions. (A) headings with indirect subdivision. (B) headings with direct subdivision. (C) list of local divisions (state, provinces, etc.) to which subdivision is always direct. Govt. Print. Off.
Chicago Style (17th ed.) CitationU. S. Library of Congress. Catalog Division. Subject Headings with Local Subdivisions. (A) Headings with Indirect Subdivision. (B) Headings with Direct Subdivision. (C) List of Local Divisions (state, Provinces, Etc.) to Which Subdivision Is Always Direct. Washington: Govt. Print. Off, 1925.
MLA (9th ed.) CitationU. S. Library of Congress. Catalog Division. Subject Headings with Local Subdivisions. (A) Headings with Indirect Subdivision. (B) Headings with Direct Subdivision. (C) List of Local Divisions (state, Provinces, Etc.) to Which Subdivision Is Always Direct. Govt. Print. Off, 1925.