APA (7th ed.) Citation

Roskin, M., & Berry, N. O. (1990). IR, an introduction to international relations. Prentice-Hall.

Chicago Style (17th ed.) Citation

Roskin, Michael, and Nicholas O. Berry. IR, an Introduction to International Relations. Englewood Cliffs, N.J: Prentice-Hall, 1990.

MLA (9th ed.) Citation

Roskin, Michael, and Nicholas O. Berry. IR, an Introduction to International Relations. Prentice-Hall, 1990.