If I Google "Malta" there is a paragraph on the right and no link to Wikipedia. This also happens in Google Maps, when you click on a city and they have the blurb, much of the time there is no link, so you have to leave the page to Wikipedia the name of the city.
Actually having just tried a few different queries, it seems to be inconsistent. I'm not sure why they'd show the link sometimes and not every time, but definitely Malta doesn't show a link for me.