@article{shariff_muhammad_zainuddin_hamidi_2012, 
  title={The Application of Sky Quality Meter at Twilight for Islamic Prayer Time}, 
  DOI={10.7763/ijapm.2012.v2.71}, 
  publisher={IACSIT Press}, 
  author={Shariff and Muhammad and Zainuddin and Hamidi}, 
  year={2012}
  }