Calkins, P. H. (1976). Four approaches to risk and uncertainty for use in farm management extension. Office of Information Service, Asian Vegetable Research & Development Center.
Chicagoスタイル(17版)引用形式Calkins, Peter H. Four Approaches to Risk and Uncertainty for Use in Farm Management Extension. Tainan, Taiwan: Office of Information Service, Asian Vegetable Research & Development Center, 1976.
MLA(9版)引用形式Calkins, Peter H. Four Approaches to Risk and Uncertainty for Use in Farm Management Extension. Office of Information Service, Asian Vegetable Research & Development Center, 1976.
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