Baumol, W. J. (1991). Economics: Principles and policy (Fifth edition.). Harcourt Brace Jovanovich.
Lua i Stíl Chicago (17ú heag.)Baumol, William J. Economics: Principles and Policy. Fifth edition. San Diego: Harcourt Brace Jovanovich, 1991.
Lua MLA (8ú heag.)Baumol, William J. Economics: Principles and Policy. Fifth edition. Harcourt Brace Jovanovich, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.