APA (7th ed.) Citation

Gray, C. S., & Sloan, G. R. (2003). Geopolitics, geography and strategy (1st published, repr.). Frank Cass.

Chicago Style (17th ed.) Citation

Gray, Colin Spencer, and Geoffrey R. Sloan. Geopolitics, Geography and Strategy. 1st published, repr. London [etc.]: Frank Cass, 2003.

MLA (9th ed.) Citation

Gray, Colin Spencer, and Geoffrey R. Sloan. Geopolitics, Geography and Strategy. 1st published, repr. Frank Cass, 2003.