Gaya APA

Baumol, W, J., Blinder, A, S, (, T. (1991). Economics : principles and policy (5th ed.). Forth Worth: Harcourt Brace Jovanovich College.

Gaya MLA

Baumol, William, J.., Blinder, Alan, S., (peng., Tambahan). "Economics : principles and policy". 5th ed. Forth Worth: Harcourt Brace Jovanovich College, 1991. Text.