Não informado. (1968). Modern data products, systems, services. Modern Data Services.
Chicago-Zitierstil (17. Ausg.)Não informado. Modern Data Products, Systems, Services. Framingham, Mass: Modern Data Services, 1968.
MLA-Zitierstil (8. Ausg.)Não informado. Modern Data Products, Systems, Services. Modern Data Services, 1968.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.