Wikipedia vs Encyclopaedia: A question of trust?

It's worth researching before you buy an online resource, or you could just stick with Wikipedia

The sale of traditional encyclopaedias moved away from door-to-door sales to the ‘added value’ that came along with CD or DVD versions in the mid-90s. These disc-based versions sold well for a while and even encouraged some new players, like Microsoft and Dorling Kindersley, to get in on the act.

Then the internet, with its free information philosophy, killed a lot of that market off. And when somebody said the magic word ‘Wiki’, the whole encyclopaedia compilation process was re-invented.