APA
Department of National Planning, . (1992). Public Investment 1992-1996. Colombo: Department of National Planning.
Chicago
Department of National Planning, . 1992. Public Investment 1992-1996. Colombo: Department of National Planning.
Harvard
Department of National Planning, . (1992). Public Investment 1992-1996. Colombo: Department of National Planning.
MLA
Department of National Planning, . Public Investment 1992-1996. Colombo: Department of National Planning. 1992.