APA (7th ed.) Zitazioa

Armstrong, D. M. (1989). A combinatorial theory of possibility. Cambridge University Press.

Chicago Style (17th ed.) Zitazioa

Armstrong, D. M. A Combinatorial Theory of Possibility. Cambridge: Cambridge University Press, 1989.

MLA (9th ed.) Zitazioa

Armstrong, D. M. A Combinatorial Theory of Possibility. Cambridge University Press, 1989.