Hedges, T. R. 1., & Sitton, G. R. 1. (1956). Farm management manual, a guide to recognizing a farm. National Press.
Chicago-viite (17. p.)Hedges, Trimble Raymond 1906, ja Gordon Russell 1916 Sitton. Farm Management Manual, a Guide to Recognizing a Farm. Palo Alto, Calif: National Press, 1956.
MLA-viite (9. p.)Hedges, Trimble Raymond 1906, ja Gordon Russell 1916 Sitton. Farm Management Manual, a Guide to Recognizing a Farm. National Press, 1956.
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