APA引文

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

Chicago Style (17th ed.) Citation

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

MLA引文

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

警告：這些引文格式不一定是100％准確.