APA (7th ed.) Citation

Winterbotham, H. S. L. (1939). A key to maps: By H.S.L. Winterbotham (2nd ed.). Blackie.

Chicago Style (17th ed.) Citation

Winterbotham, H. S. L. A Key to Maps: By H.S.L. Winterbotham. 2nd ed. London: Blackie, 1939.

MLA (8th ed.) Citation

Winterbotham, H. S. L. A Key to Maps: By H.S.L. Winterbotham. 2nd ed. Blackie, 1939.

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