Dyfyniad APA

Johnston, J. (1997). Econometric methods (4th ed.). McGraw-Hill.

Dyfyniad Arddull Chicago

Johnston, Jack. Econometric Methods. 4th ed. New York: McGraw-Hill, 1997.

Dyfyniad MLA

Johnston, Jack. Econometric Methods. 4th ed. McGraw-Hill, 1997.

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