Draper, W. F. (1950). Voluntary Health Insurance on the National Scene—The United Mine Workers Health Program.
Chicago-tyylinen lähdeviittausDraper, Warren F. Voluntary Health Insurance On the National Scene—The United Mine Workers Health Program. 1950.
MLA-viiteDraper, Warren F. Voluntary Health Insurance On the National Scene—The United Mine Workers Health Program. 1950.
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