MLA

Stephenson, Michael H. Returning Carbon to Nature : Coal, Carbon, and Storage. Elsevier, 2013.

APA

Stephenson, M. H. (2013). Returning carbon to nature : coal, carbon, and storage. Elsevier.

Chicago

Stephenson, Michael H. Returning Carbon to Nature : Coal, Carbon, and Storage. : Elsevier, 2013.