APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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