Dyfyniad APA

Parkin, M., Powell, M., & Matthews, K. (2008). Economics (Seventh edition.). Addison-Wesley.

Dyfyniad Arddull Chicago

Parkin, Michael, Melanie Powell, and Kent Matthews. Economics. Seventh edition. Harlow, England ; Boston, MA: Addison-Wesley, 2008.

Dyfyniad MLA

Parkin, Michael, et al. Economics. Seventh edition. Addison-Wesley, 2008.

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