What is the 4 ethnic groups located on the balkan peninsula?

There are many more than four ethnic groups on the Balkan Peninsula. There are twelve national ethnic groups on the Balkans (Albanians, Bosnian, Bulgarians, Croatians, Greeks, Herzegovinians, Kosovars, Macedonians, Montenegrins, Romanians, Serbians, and Turks). There are also many ethnic groups by Immigration, such as Italians, Germans, Russians, Ukrainians, and Cypriots.