Cita APA (7th ed.)

Heise, U. K. Extinction: Ursula K. Heise. Keywords for environmental studies.([2016]).

Cita Chicago (17th ed.)

Heise, Ursula K. "Extinction: Ursula K. Heise." Keywords for Environmental Studies.([2016]) .

Cita MLA (8th ed.)

Heise, Ursula K. "Extinction: Ursula K. Heise." Keywords for Environmental Studies.([2016]), .

Atenció: Aquestes cites poden no estar 100% correctes.