Godyn, D. L. (1974). Economic survey of cocoa in Papua New Guinea. Dept. of Agriculture, Stock and Fisheries.
Chicagoスタイル(17版)引用形式Godyn, D. L. Economic Survey of Cocoa in Papua New Guinea. Port Moresby: Dept. of Agriculture, Stock and Fisheries, 1974.
MLA(9版)引用形式Godyn, D. L. Economic Survey of Cocoa in Papua New Guinea. Dept. of Agriculture, Stock and Fisheries, 1974.
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