Helcke, George
The energy saving guide: tables for assessing the profitability of energy saving measures with explanatory notes and worked examples
Commission of the European Communities by Pergamon Press, 1981
 Buku Teks SO
Smith, Peter F.
Eco-refurbishment : a guide to saving and producing energy in the home
Architectural Press, 2004
 Buku Teks SO
Saving energy pada perencanaan sistem air handling unit
Fakultas Teknik Universitas Indonesia, 1992
 UI - Skripsi Membership
Cascade control using soft sensor for aldehide column energy saving
 Artikel Jurnal
Denno, Khalil
Electric protective devices : protective with energy saving / Khalil Denno
McGraw-Hill, 1994
 Buku Teks