APA
Copehart Barney L, Jeff Bier, . (2000). Guide to Energy Management. N.Delhi: S.Chand & Company Limited.
Chicago
Copehart Barney L, Jeff Bier, . 2000. Guide to Energy Management. N.Delhi: S.Chand & Company Limited.
Harvard
Copehart Barney L, Jeff Bier, . (2000). Guide to Energy Management. N.Delhi: S.Chand & Company Limited.
MLA
Copehart Barney L, Jeff Bier, . Guide to Energy Management. N.Delhi: S.Chand & Company Limited. 2000.