APA (7th ed.) Citation

Pounds, N. J. G. (1952). The Ruhr: A study in historical and economic geography. Faber and Faber.

Chicago Style (17th ed.) Citation

Pounds, Norman John Greville. The Ruhr: A Study in Historical and Economic Geography. London: Faber and Faber, 1952.

MLA (9th ed.) Citation

Pounds, Norman John Greville. The Ruhr: A Study in Historical and Economic Geography. Faber and Faber, 1952.