Leftwich, R. H., & Eckert, R. D. (1982). The price system and resource allocation (8th ed.). Dryden Press.
Lua i Stíl Chicago (17ú heag.)Leftwich, Richard H., agus Ross D. Eckert. The Price System and Resource Allocation. 8th ed. Chicago: Dryden Press, 1982.
Lua MLA (9ú heag.)Leftwich, Richard H., agus Ross D. Eckert. The Price System and Resource Allocation. 8th ed. Dryden Press, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.