APA (7 ম সংস্করণ) উদ্ধৃতি

Papua New Guinea. Postal and Telecommunication Services. (1980). The first 25 years: P & T's silver jubilee of service to the nation Papua New Guinea 1980. Dept. of Public Utilities.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Papua New Guinea. Postal and Telecommunication Services. The First 25 Years: P & T's Silver Jubilee of Service to the Nation Papua New Guinea 1980. [Port Moresby]: Dept. of Public Utilities, 1980.

M.L.A (8 ম সংস্করণ) উদ্ধৃতি

Papua New Guinea. Postal and Telecommunication Services. The First 25 Years: P & T's Silver Jubilee of Service to the Nation Papua New Guinea 1980. Dept. of Public Utilities, 1980.