Dyfyniad APA

(2001). Cost-benefit analysis: Concepts and practice. Prentice Hall.

Dyfyniad Arddull Chicago

Cost-benefit Analysis: Concepts and Practice. Prentice Hall, 2001.

Dyfyniad MLA

Cost-benefit Analysis: Concepts and Practice. Prentice Hall, 2001.

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