Dyfyniad APA

tinbergen, j. (1963). the appraisal of investment project. National Planning Institute.

Dyfyniad Arddull Chicago

tinbergen, j. The Appraisal of Investment Project. cairo: National Planning Institute, 1963.

Dyfyniad MLA

tinbergen, j. The Appraisal of Investment Project. National Planning Institute, 1963.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.