Cita APA

Olson, W. C., & Groom, A. J. R. (1991). International relations then and now: Origins and trends in interpretation. HarperCollins Acad.

Citación estilo Chicago

Olson, William C., y A. J. R. Groom. International Relations Then and Now: Origins and Trends in Interpretation. London: HarperCollins Acad, 1991.

Cita MLA

Olson, William C., y A. J. R. Groom. International Relations Then and Now: Origins and Trends in Interpretation. HarperCollins Acad, 1991.