Dyfyniad APA

Nicol, P., Rhodes, B., & Crouch, A. (2004). The value of oil and gas reserves. Oxford Institute for Energy Studies.

Dyfyniad Arddull Chicago

Nicol, P., B. Rhodes, and A. Crouch. The Value of Oil and Gas Reserves. Oxford Institute for Energy Studies, 2004.

Dyfyniad MLA

Nicol, P., et al. The Value of Oil and Gas Reserves. Oxford Institute for Energy Studies, 2004.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.