Spedding, C. R. W. (1988). An introduction to agricultural systems: C. R. W. Spedding. London: Elsevier Applied Science.
シカゴスタイル引用形Spedding, C. R. W. An Introduction to Agricultural Systems: C. R. W. Spedding. London: Elsevier Applied Science, 1988.
MLA引用形式Spedding, C. R. W. An Introduction to Agricultural Systems: C. R. W. Spedding. London: Elsevier Applied Science, 1988.
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