Ombudsman Commission of Papua New Guinea, Wangatau, A., Ridges, J., & Maino, C. (1992). Report of an investigation into Spring Garden Road Poreporena freeway project. Ombudsman Commission of Papua New Guinea.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিOmbudsman Commission of Papua New Guinea, Ango Wangatau, Jim Ridges, এবং Charles Maino. Report of an Investigation into Spring Garden Road Poreporena Freeway Project. [Waigani]: Ombudsman Commission of Papua New Guinea, 1992.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিOmbudsman Commission of Papua New Guinea, et al. Report of an Investigation into Spring Garden Road Poreporena Freeway Project. Ombudsman Commission of Papua New Guinea, 1992.
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