Dyfyniad APA

Johnston, J. (1997). Econometric methods. McGraw-Hill.

Dyfyniad Arddull Chicago

Johnston, Jack. Econometric Methods. McGraw-Hill, 1997.

Dyfyniad MLA

Johnston, Jack. Econometric Methods. McGraw-Hill, 1997.

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