Dyfyniad APA

Griffiths,Alan, & Wall,Stuart. (1999). Applied economics: Introductory course (8.). Longman.

Dyfyniad Arddull Chicago

Griffiths,Alan, and Wall,Stuart. Applied Economics: Introductory Course. 8. London: Longman, 1999.

Dyfyniad MLA

Griffiths,Alan, and Wall,Stuart. Applied Economics: Introductory Course. 8. Longman, 1999.

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