Lua APA (7ú heag.)

Costanza, R. Economy: Robert Costanza. Keywords for environmental studies.([2016]).

Lua i Stíl Chicago (17ú heag.)

Costanza, Robert. "Economy: Robert Costanza." Keywords for Environmental Studies.([2016]) .

Lua MLA (8ú heag.)

Costanza, Robert. "Economy: Robert Costanza." Keywords for Environmental Studies.([2016]), .

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.