APA (7th ed.) Citation

Griffith, D. R., Mannering, J. V., & Richey, C. B. (1977). Energy requirements and areas of adaptation for eight tillage-planting systems for corn. Agricultural Experiment Station, Purdue University.

Chicago Style (17th ed.) Citation

Griffith, D. R., J. V. Mannering, and C. B. Richey. Energy Requirements and Areas of Adaptation for Eight Tillage-planting Systems for Corn. West Lafayette, Ind.: Agricultural Experiment Station, Purdue University, 1977.

MLA (9th ed.) Citation

Griffith, D. R., et al. Energy Requirements and Areas of Adaptation for Eight Tillage-planting Systems for Corn. Agricultural Experiment Station, Purdue University, 1977.