Geological Survey of Papua New Guinea, Papua New Guinea. Department of Mining and Petroleum, Tutton, M. A., Buleka, J., Berhane, D., Lytham, J. D., & Michael, E. (1993). Papua New Guinea Department of Mining and Petroleum, Geological Survey report. PNG Dept. of Mining & Petroleum.
Cita Chicago Style (17a ed.)Geological Survey of Papua New Guinea, Papua New Guinea. Department of Mining and Petroleum, M. A. Tutton, J. Buleka, D. Berhane, J. D. Lytham, y E. Michael. Papua New Guinea Department of Mining and Petroleum, Geological Survey Report. Port Moresby: PNG Dept. of Mining & Petroleum, 1993.
Cita MLA (9a ed.)Geological Survey of Papua New Guinea, et al. Papua New Guinea Department of Mining and Petroleum, Geological Survey Report. PNG Dept. of Mining & Petroleum, 1993.