APA (7th ed.) Citation

Mackinder, H. J. (1969). Britain and the British seas. Greenwood Press.

Chicago Style (17th ed.) Citation

Mackinder, Halford J. Britain and the British Seas. Westport, Conn.: Greenwood Press, 1969.

MLA (8th ed.) Citation

Mackinder, Halford J. Britain and the British Seas. Greenwood Press, 1969.