Public opinion can be measured through referendum.
Referendum is the submission to the electorate for approval or rejection of some aspects of legislation. It is a nice tool for measuring public opinion. Thhis is so due to the fact that it gives out an aggregate view of the people's opinion on a particular public policy. Other methods of measuring public opinion are:
1. Direct Observation
2. Survey or Opinion Poll
3. Secondary Sources e.g Information from libraries
4. Election
5. Through Mass Media.