APA引文

Papua New Guinea & United Nations Environment Programme. (1986). Environmental management in Papua New Guinea. [s.n.].

Chicago Style (17th ed.) Citation

Papua New Guinea and United Nations Environment Programme. Environmental Management in Papua New Guinea. [S.l.]: [s.n.], 1986.

MLA引文

Papua New Guinea and United Nations Environment Programme. Environmental Management in Papua New Guinea. [s.n.], 1986.