3
Consider a hypothetical quote:
Each day we gather information from manufacturers, distributors, Russian and foreign vendors, research centers. The reliability of the sources is ensured by our contacts with employees in those organizations.
Those is used to describe objects that are more distant, either physically or in the abstract sense. But could we say "these organizations" here, since they have been introduced in the first sentence and hence made somewhat "closer" to the reader? Or would that be a mistake?
2
Both of these and those, as the plurals of this and that, can be used for referring back. See also http://ell.stackexchange.com/a/13993/3281.
– Damkerng T. – 2014-01-11T07:26:54.5431On a side note, you have used both American and British spelling in your question: "organization" is American and "organisation" is British. It is advisable to stick to the accepted set for your location (not necessarily important for this site, of course, but in other contexts it might matter). – nxx – 2014-01-11T13:37:08.000