Cita APA (7a ed.)

Hollis, M., & Smith, S. M. (1991). Explaining and understanding international relations. University Press.

Cita Chicago Style (17a ed.)

Hollis, Martin, y Steven M. Smith. Explaining and Understanding International Relations. Oxford [etc.]: University Press, 1991.

Cita MLA (9a ed.)

Hollis, Martin, y Steven M. Smith. Explaining and Understanding International Relations. University Press, 1991.