APA
W.H.O, . (1990). The work of W.H.O. in the south-east asia region 1st july, 1989 to 30th june 1990. W.H.O., New Delhi: .
Chicago
W.H.O, . 1990. The work of W.H.O. in the south-east asia region 1st july, 1989 to 30th june 1990. W.H.O., New Delhi: .
Harvard
W.H.O, . (1990). The work of W.H.O. in the south-east asia region 1st july, 1989 to 30th june 1990. W.H.O., New Delhi: .
MLA
W.H.O, . The work of W.H.O. in the south-east asia region 1st july, 1989 to 30th june 1990. W.H.O., New Delhi: . 1990.