Cole, G. D. H. (1927). The economic system: An elementary outline. Longmans, Green.
Lua i Stíl Chicago (17ú heag.)Cole, G. D. H. The Economic System: An Elementary Outline. London: Longmans, Green, 1927.
Lua MLA (8ú heag.)Cole, G. D. H. The Economic System: An Elementary Outline. Longmans, Green, 1927.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.