Gaya APA

Baumol, W, J., Blinder, A, S. (2001). Economics: principles and policy : 2001 update (8th ed.). txu: .

Gaya MLA

Baumol, William, J.., Blinder, Alan, S.. "Economics: principles and policy : 2001 update". 8th ed. txu: , 2001. print.