Lua APA (7ú heag.)

Ason, A. (2022). International gas contracts. Oxford Institute for Energy Studies.

Lua i Stíl Chicago (17ú heag.)

Ason, A. International Gas Contracts. Oxford Institute for Energy Studies, 2022.

Lua MLA (9ú heag.)

Ason, A. International Gas Contracts. Oxford Institute for Energy Studies, 2022.

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