Παραπομπή APA

Gunjal, K. R., & Heady, E. O. (1983). Economic analysis of U.S. farm mechanization. Ames: Center for Agricultural and Rural Development. Iowa State University.

Παραπομπή Chicago Style

Gunjal, Kisan R., and Earl O. Heady. Economic Analysis of U.S. Farm Mechanization. Ames: Center for Agricultural and Rural Development. Iowa State University, 1983.

Παραπομπή MLA

Gunjal, Kisan R., and Earl O. Heady. Economic Analysis of U.S. Farm Mechanization. Ames: Center for Agricultural and Rural Development. Iowa State University, 1983.

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