APA (7th ed.) Citation

Perry, D. G., & Seaman, R. D. H. (1974). Sketch-maps in modern history 1789 - 1970 (4. ed., reprinted.). Murray.

Chicago Style (17th ed.) Citation

Perry, D. G., and R. D. H. Seaman. Sketch-maps in Modern History 1789 - 1970. 4. ed., reprinted. London: Murray, 1974.

MLA (9th ed.) Citation

Perry, D. G., and R. D. H. Seaman. Sketch-maps in Modern History 1789 - 1970. 4. ed., reprinted. Murray, 1974.