Citazione Stile APA (7a Edizione)

Heady, E. O. (1961). Agricultural supply functions: Estimating techniques and interpretation. Assembled and published under the sponsorship of the North Central Farm Management Research Committee. Iowa State University Press.

Citazione stile Chigago Style (17a edizione)

Heady, Earl O. Agricultural Supply Functions: Estimating Techniques and Interpretation. Assembled and Published Under the Sponsorship of the North Central Farm Management Research Committee. Ames: Iowa State University Press, 1961.

Citatione MLA (8a ed.)

Heady, Earl O. Agricultural Supply Functions: Estimating Techniques and Interpretation. Assembled and Published Under the Sponsorship of the North Central Farm Management Research Committee. Iowa State University Press, 1961.