Não informado. (1988). Service report: Power plants, maintenance, upgrading. Siemens AG.
Chicago (17e ed.) BronvermeldingNão informado. Service Report: Power Plants, Maintenance, Upgrading. Erlangen, Alemanha: Siemens AG, 1988.
MLA (8e ed.) BronvermeldingNão informado. Service Report: Power Plants, Maintenance, Upgrading. Siemens AG, 1988.
Let op: Deze citaties zijn niet altijd 100% accuraat.