MACHANG, 13 August - Congratulations Dr Nik Mohamad Shamim Nik Mohd Zainordin, Dr An Nur Nabila Ismail, Dr Ayu Kamareena Abdullah Thani and Dr Nurhidayah Rosely on the Publication of Research Paper in the Indexed Journal ERA titled The Impact of Ecological Sustainability on Tourists' Satisfaction and Revisit Intention: A Case Study in Langkawi, Malaysia.