APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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