R. A. Purwanto, I. G. P. Warka, and I. Ashari, “ANALISA PRODUKTIVITAS TENAGA KERJA DI AREA PELABUHAN STUDI PADA PT. ASDP WILAYAH KERJA KAYANGAN LOMBOK TIMUR: Analysis of Labor Productivity in the Port Area Study on PT. ASDP East Lombok Kayangan Working Area”, SS, vol. 5, no. 2, pp. 117–128, Jan. 2019.