Potterton, W. J. (1967). International businessmaen's who's who 1967. London: Burke's Peerage.
Παραπομπή Chicago StylePotterton, W. J. International Businessmaen's Who's Who 1967. London: Burke's Peerage, 1967.
Παραπομπή MLAPotterton, W. J. International Businessmaen's Who's Who 1967. London: Burke's Peerage, 1967.
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