Langley, J. A., Vocke, G., & Whiting, L. R. (1994). Earl O. Heady: His impact on agricultural economics. Iowa State University Press.
Chicago Style (17th ed.) CitationLangley, James A., Gary Vocke, and Larry R. Whiting. Earl O. Heady: His Impact on Agricultural Economics. Ames: Iowa State University Press, 1994.
MLA (9th ed.) CitationLangley, James A., et al. Earl O. Heady: His Impact on Agricultural Economics. Iowa State University Press, 1994.
Warning: These citations may not always be 100% accurate.