APA (7th ed.) Citation

Wright, G. H. v. (1976). An essay in modal logic (Reprint of the 1951 ed. published by North-Holland Publishing Co., Amsterdam.). University Microfilms.

Chicago Style (17th ed.) Citation

Wright, Georg Henrik von. An Essay in Modal Logic. Reprint of the 1951 ed. published by North-Holland Publishing Co., Amsterdam. Ann Arbor, Mich: University Microfilms, 1976.

MLA (9th ed.) Citation

Wright, Georg Henrik von. An Essay in Modal Logic. Reprint of the 1951 ed. published by North-Holland Publishing Co., Amsterdam. University Microfilms, 1976.