Perbandingan Crossed Leg Sitting Position dan Traditional Sitting Position terhadap keberhasilan penempatan jarum spinal pada pasien bedah urologi = Comparison of Crossed Leg Sitting Position and Traditional Sitting Position to successful insertion of spinal needle for patient undergoing urologic surgery procedure - Manggala, Sidharta Kusuma, author (Fakultas Kedokteran Universitas Indonesia, 2015)