Prevalensi kelelahan umum pekerja laki-laki call center bagian Inbound jasa layanan C dan faktor-faktor yang berhubungan di PT X Jakarta = The Prevalence of general fatigue on male call center workers at Inbound division of C service and the related factors at PT X Jakarta - Lenni Dhamayanti, author (Fakultas Kedokteran Universitas Indonesia, 2009)