United States. Office of Cooperative Extension Work & Chambers, C. L. (1930). How supervisor aids county agent. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Office of Cooperative Extension Work and C. L. Chambers. How Supervisor Aids County Agent. Washington: [publisher not identified], 1930.
MLA (9th ed.) CitationUnited States. Office of Cooperative Extension Work and C. L. Chambers. How Supervisor Aids County Agent. [publisher not identified], 1930.
Warning: These citations may not always be 100% accurate.