Ason, A. (2022). International gas contracts. Oxford Institute for Energy Studies.
Čikaški stil citiranja (17. izdanje)Ason, A. International Gas Contracts. Oxford Institute for Energy Studies, 2022.
MLA način citiranja (9. izdanje)Ason, A. International Gas Contracts. Oxford Institute for Energy Studies, 2022.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.