A STUDY TRADE UNIONS EFFECTIVENESS IN MALAYSIA / by Dzulzalani Eden, author, Mohd. Azizul Hafiz Jamian, author, Claudia Jiton, author, Christopher Perumal, author, Awang Ideris Awang Daud, author, Judhiana Ab. Ghani, author, Neilson Ilan Mersat, author, Abdul Jabbar Abdullah, author, Malaysia. Ministry of Human Rasources. Institute of Labour Market Information and Analysis (ILMIA), issuing body