Não informado. (1980). Enhanced Energy Recovery News. Business Communications.
Chicago-Zitierstil (17. Ausg.)Não informado. Enhanced Energy Recovery News. Houston, Tex: Business Communications, 1980.
MLA-Zitierstil (8. Ausg.)Não informado. Enhanced Energy Recovery News. Business Communications, 1980.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.