Metodologi penelitian sosial - Husaini Usman (Bumi Aksara, 1996)
bhr/ir,c.2/sghc3-4/oen, C.5/oen, c.6/en, c.1/stoc6, c.1,2,4/stoc1,c.3,5/irh,c.6./ws.c.7-9