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Lua i Stíl Chicago (17ú heag.).Pearce, D. W. The Social Appraisal of Projects: A Text in Cost-benefit Analysis. london: the english language book society and macmillan, 1981.
Lua MLA (9ú heag.).Pearce, D. W. The Social Appraisal of Projects: A Text in Cost-benefit Analysis. the english language book society and macmillan, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.