Albrecht, H. (1989). Agricultural extension .V.1: Basic concepts and methods. Wiley Eastern Limited.
シカゴスタイル引用形Albrecht, H. Agricultural Extension .V.1: Basic Concepts and Methods. New Delhi: Wiley Eastern Limited, 1989.
MLA引用形式Albrecht, H. Agricultural Extension .V.1: Basic Concepts and Methods. Wiley Eastern Limited, 1989.
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