Παραπομπή APA

Yang, W. (1965). Methods of farm management investigations: For improving farm productivity. Food and agriculture organiation of the united nation.

Παραπομπή Chicago Style

Yang, W.Y. Methods of Farm Management Investigations: For Improving Farm Productivity. Rome: Food and agriculture organiation of the united nation, 1965.

Παραπομπή MLA

Yang, W.Y. Methods of Farm Management Investigations: For Improving Farm Productivity. Food and agriculture organiation of the united nation, 1965.