K. D. Handayani, A. Asriwati, T. N. Utami, A. D. Fitriani, и I. Anggraini, „The Effect of the Work Environment on the Work Productivity of Nurses at Dr Tengku Mansyur Hospital, Tanjung Balai City “, IJPASR, том 3, изд. 1, стр. 38-50, Јуни 2022.