Cita APA (7a ed.)

Wright, G. H. v. (1951). An essay in modal logic. North-Holland.

Cita Chicago Style (17a ed.)

Wright, Georg Henrik von. An Essay in Modal Logic. Amsterdam: North-Holland, 1951.

Cita MLA (8a ed.)

Wright, Georg Henrik von. An Essay in Modal Logic. North-Holland, 1951.