Cutforth, Arthur E.
Audits
Gee and Company, 1971
 Buku Teks
Information brokers and reference services
edited by Robin Kinder; Bill Katz
The Haworth Press, 1988
 Buku Teks
Thumann, Albert
Handbook of energy audits
CRC Press, Taylor & Francis, 2010
 Buku Referensi
VanGuilder, Cliff
Environmental audits / Cliff VanGuilder
Mercury Learning and Information, 2014
 Buku Teks
Thumann, Albert
Handbook of energy audits
Taylor &​ Francis, 2013
 Buku Teks