Lua APA (7ú heag.)

University of Maryland, College Park. Bureau of Business and Economic Research. (1954). Southern Maryland, a tobacco economy.

Lua i Stíl Chicago (17ú heag.)

University of Maryland, College Park. Bureau of Business and Economic Research. Southern Maryland, a Tobacco Economy. College Park, 1954.

Lua MLA (8ú heag.)

University of Maryland, College Park. Bureau of Business and Economic Research. Southern Maryland, a Tobacco Economy. 1954.

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