APA-viite (7. p.)
Lewis, J. P. (1980). Development co-operation: Efforts and policies of the membrers of the Development Assistance Committee.
Chicago-viite (17. p.)
Lewis, John P. Development Co-operation: Efforts and Policies of the Membrers of the Development Assistance Committee. 1980.
MLA-viite (9. p.)
Lewis, John P. Development Co-operation: Efforts and Policies of the Membrers of the Development Assistance Committee. 1980.
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