APA
W.H.O.T.R.S.803, . (1990). Systems of continuing education : priority to district health personnel. W.H.O., Geneva: .
Chicago
W.H.O.T.R.S.803, . 1990. Systems of continuing education : priority to district health personnel. W.H.O., Geneva: .
Harvard
W.H.O.T.R.S.803, . (1990). Systems of continuing education : priority to district health personnel. W.H.O., Geneva: .
MLA
W.H.O.T.R.S.803, . Systems of continuing education : priority to district health personnel. W.H.O., Geneva: . 1990.