Colombo Plan Bureau. The Colombo Plan. Annual Report Colombo Plan Council. Colombo Plan Bureau.
Chicago-viite (17. p.)Colombo Plan Bureau. The Colombo Plan. Annual Report Colombo Plan Council. Colombo: Colombo Plan Bureau.
MLA-viite (9. p.)Colombo Plan Bureau. The Colombo Plan. Annual Report Colombo Plan Council. Colombo Plan Bureau.
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