Lua APA (7ú heag.)

BEDFORD, K. (2010). ENERGY OUR WORLD: COAL. S.CHAND PUBLISHING.

Lua i Stíl Chicago (17ú heag.)

BEDFORD, KATE. ENERGY OUR WORLD: COAL. NEW DELHI: S.CHAND PUBLISHING, 2010.

Lua MLA (9ú heag.)

BEDFORD, KATE. ENERGY OUR WORLD: COAL. S.CHAND PUBLISHING, 2010.

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