Cita APA

Sloan, G. R., Gray, C. S., & Gray, C. (1999). Geopolitics, geography, and strategy. London: Frank Cass.

Citación estilo Chicago

Sloan, G. R., Colin S. Gray, and Colin Gray. Geopolitics, Geography, and Strategy. London: Frank Cass, 1999.

Cita MLA

Sloan, G. R., Colin S. Gray, and Colin Gray. Geopolitics, Geography, and Strategy. London: Frank Cass, 1999.