American Society of Agricultural Engineers & Stephens, L. E. (1981). Energy requirements for tillage and planting. American Society of Agricultural Engineers.
Chicago Style (17th ed.) CitationAmerican Society of Agricultural Engineers and Lyle E. Stephens. Energy Requirements for Tillage and Planting. St. Joseph, Mich.: American Society of Agricultural Engineers, 1981.
MLA (9th ed.) CitationAmerican Society of Agricultural Engineers and Lyle E. Stephens. Energy Requirements for Tillage and Planting. American Society of Agricultural Engineers, 1981.
Warning: These citations may not always be 100% accurate.