Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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