Cita APA (7a ed.)

Feys, R., & Dopp, J. (1965). Modal logics. Gauthier-Villars : Nauwelaerts.

Cita Chicago Style (17a ed.)

Feys, Robert, y Joseph Dopp. Modal Logics. Louvain ; Paris: Gauthier-Villars : Nauwelaerts, 1965.

Cita MLA (9a ed.)

Feys, Robert, y Joseph Dopp. Modal Logics. Gauthier-Villars : Nauwelaerts, 1965.