Porgera Joint Venture. (1993). Ol askim na bekim bilong porgera gol projek = Questions and answers about the Porgera gold project. Frank Mills and Associates.
Цитирование в стиле Чикаго (17-е изд.)Porgera Joint Venture. Ol Askim Na Bekim Bilong Porgera Gol Projek = Questions and Answers About the Porgera Gold Project. Port Moresby: Frank Mills and Associates, 1993.
Цитирование MLA (9-е изд.)Porgera Joint Venture. Ol Askim Na Bekim Bilong Porgera Gol Projek = Questions and Answers About the Porgera Gold Project. Frank Mills and Associates, 1993.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.