Hilmy, Nafiys, 		Mardijana, Alif, AND 		Rachmawati, Dwita.
" The Correlation between Nicotine Dependence Level and Negative Symptom in Schizophrenic Patients at Psychiatric Department of PTPN XI Djatiroto Lumajang Hospital" <em>Journal of Agromedicine and Medical Sciences</em> [Online], Volume 4 Number 1 (4 February 2018)