Author
People's Action Party (Singapore)
2
Himpunan Belia Islam (Singapore)
1
Institute of Education (Singapore)
1
National Book Development Council of Singapore
1
People's Association
1
Singapore Council of Social Service
1
Singapore Educational Media Service
1
Singapore National Trades Union Congress
1
Singapore. Education Publications Bureau
1
Singapore. Muslim Religious Affairs Division
1
Workers' Party (Singapore)
1