(1969). Who owns whom: A directory of parent, associate and subsidiary companies, 1969/70 (9th ed.). London: O.W. Roskill.
Παραπομπή Chicago StyleWho Owns Whom: A Directory of Parent, Associate and Subsidiary Companies, 1969/70. 9th ed. London: O.W. Roskill, 1969.
Παραπομπή MLAWho Owns Whom: A Directory of Parent, Associate and Subsidiary Companies, 1969/70. 9th ed. London: O.W. Roskill, 1969.
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