Dyfyniad APA

Heal,Geoffrey. (1999). The economics of increasing returns. Edward Elgar.

Dyfyniad Arddull Chicago

Heal,Geoffrey. The Economics of Increasing Returns. U K: Edward Elgar, 1999.

Dyfyniad MLA

Heal,Geoffrey. The Economics of Increasing Returns. Edward Elgar, 1999.

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