Murphy, D. R. (1962). What farmers read and like; a record of experiments with readership on Wallaces' farmer and Wisconsin agriculturist, 1938-1961. Iowa Univesity Press.
Citace podle Chicago (17th ed.)Murphy, Donald R. What Farmers Read and like; a Record of Experiments with Readership on Wallaces' Farmer and Wisconsin Agriculturist, 1938-1961. Ames: Iowa Univesity Press, 1962.
Citace podle MLA (9th ed.)Murphy, Donald R. What Farmers Read and like; a Record of Experiments with Readership on Wallaces' Farmer and Wisconsin Agriculturist, 1938-1961. Iowa Univesity Press, 1962.
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