In other words, I would like to know what makes a company a multicultural entity? if you have any idea about papers or researchers that have discussed the factors which determine cultural differences in organizations it would be greatly appreciated.
Marilyn Loden's Implementing Diversity is a very good resource to start with, although not very recent.
Out of experience, I'd say the first determinant is the existence of a strategy acknowledging the need to create cultural diversity in organizations. Without it, it's just window dressing.