APA aipamena

Robert H. M. & Collins, J. H. (2009). Handbook of energy conservation. Alkem.

Chicago Style aipamena

Robert H. M. and J. H. Collins. Handbook of Energy Conservation. Singapore: Alkem, 2009.

MLA aipamena

Robert H. M. and J. H. Collins. Handbook of Energy Conservation. Alkem, 2009.