APA-viite (7. p.)
(2012). Papua New Guinea: Critical development constraints. Asian Development Bank.
Chicago-viite (17. p.)
Papua New Guinea: Critical Development Constraints. Mandaluyong City, Metro Manila, Philipiines: Asian Development Bank, 2012.
MLA-viite (9. p.)
Papua New Guinea: Critical Development Constraints. Asian Development Bank, 2012.
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