APA (7th ed.) Citation

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.) Citation

Langley, 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.) Citation

Langley, James A., et al. Earl O. Heady: His Impact on Agricultural Economics. Iowa State University Press, 1994.