Cita APA (7a ed.)

Eiter, T., & Gottlob, G. (1993). Propositional Circumscription and Extended Closed−World Reasoning are IIp2−Complete.

Cita Chicago Style (17a ed.)

Eiter, T., y G. Gottlob. Propositional Circumscription and Extended Closed−World Reasoning Are IIp2−Complete. 1993.

Cita MLA (9a ed.)

Eiter, T., y G. Gottlob. Propositional Circumscription and Extended Closed−World Reasoning Are IIp2−Complete. 1993.