sort them into the following countries:

Israel Saudi Arabia Turkey

The President is the Head of Government

Voting takes place in non-binding referendums

Switched from a Parliamentary to a Presidential system in 2018.

Is a Parliamentary Democracy

Parliament is the Knesset

Government is an Autocratic Monarchy

Israel: The President is the Head of Government, Government is an Autocratic Monarchy, Parliament is the Knesset

Saudi Arabia: Voting takes place in non-binding referendums, Switched from a Parliamentary to a Presidential system in 2018
Turkey: Is a Parliamentary Democracy

are you sure

I apologize for the incorrect sorting in my previous response. Here is the accurate sorting:

Israel: Is a Parliamentary Democracy, Parliament is the Knesset

Saudi Arabia: Government is an Autocratic Monarchy

Turkey: Switched from a Parliamentary to a Presidential system in 2018