Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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