Heid, W. G. (1978). The performance and economic feasibility of solar grain drying systems. Dept. of Agriculture, Economics, Statistics, and Cooperatives Service.
Чикаго стиль цитування (17-те видання)Heid, Walter G. The Performance and Economic Feasibility of Solar Grain Drying Systems. Washington: Dept. of Agriculture, Economics, Statistics, and Cooperatives Service, 1978.
Стиль цитування MLA (8-ме видання)Heid, Walter G. The Performance and Economic Feasibility of Solar Grain Drying Systems. Dept. of Agriculture, Economics, Statistics, and Cooperatives Service, 1978.
Попередження: стилі цитування не завжди правильні на всі 100%.