National Research Institute (Papua New Guinea) & National Literature Board (P.N.G.). (1990). National Literature Competition, 1990: The annual poetry competition (Single entries - English/Tok Pisin - Special school section). [National Research Institute].
Chicagoスタイル(17版)引用形式National Research Institute (Papua New Guinea) , National Literature Board (P.N.G.). National Literature Competition, 1990: The Annual Poetry Competition (Single Entries - English/Tok Pisin - Special School Section). [Port Moreby]: [National Research Institute], 1990.
MLA(9版)引用形式National Research Institute (Papua New Guinea) , National Literature Board (P.N.G.). National Literature Competition, 1990: The Annual Poetry Competition (Single Entries - English/Tok Pisin - Special School Section). [National Research Institute], 1990.