Sharp,Ansel M. (1996). Economics of social issues (12.). Irwin Book Team.
Dyfyniad Arddull ChicagoSharp,Ansel M. Economics of Social Issues. 12. Chicago: Irwin Book Team, 1996.
Dyfyniad MLASharp,Ansel M. Economics of Social Issues. 12. Irwin Book Team, 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.