Geus, J. G. D. (1967). Fertilizer guide for tropical and subtropical farming. Zurich: Centre D'Etude De L'Azote.
シカゴスタイル引用形Geus, J. G. De. Fertilizer Guide for Tropical and Subtropical Farming. Zurich: Centre D'Etude De L'Azote, 1967.
MLA引用形式Geus, J. G. De. Fertilizer Guide for Tropical and Subtropical Farming. Zurich: Centre D'Etude De L'Azote, 1967.
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