(1991). Energy Security: Federal Responses to December 1989 Heating Fuel Shortages Were Limited.
Čikaški stil citiranja (17. izdanje)Energy Security: Federal Responses to December 1989 Heating Fuel Shortages Were Limited. 1991.
MLA način citiranja (9. izdanje)Energy Security: Federal Responses to December 1989 Heating Fuel Shortages Were Limited. 1991.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.