Cita APA (7th ed.)

Armstrong, D. M. (1997). A world of states of affairs (1a. ed.). Cambridge University Press.

Cita Chicago (17th ed.)

Armstrong, D. M. A World of States of Affairs. 1a. ed. Nueva York: Cambridge University Press, 1997.

Cita MLA (9th ed.)

Armstrong, D. M. A World of States of Affairs. 1a. ed. Cambridge University Press, 1997.