.Knox, P. L., .Agnew, J. A., & McCarthy, L. (2008). The geography of the world economy (5th ed.). Hodder Education.
Dyfyniad Arddull Chicago.Knox, Paul L., John A. .Agnew, and Linda McCarthy. The Geography of the World Economy. 5th ed. London: Hodder Education, 2008.
Dyfyniad MLA.Knox, Paul L., et al. The Geography of the World Economy. 5th ed. Hodder Education, 2008.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.