Gaya APA

Baumol, W, J., Blinder, A, S. (1988). Economics: principles and policy (4). : Harcourt Brace Jovanovich Publishers.

Gaya MLA

Baumol, William, J., Blinder, Alan, S. "Economics: principles and policy". 4 : Harcourt Brace Jovanovich Publishers, 1988. .