Nigeria. (1956). Statement of the policy proposed by the government of the Federation for the establishment of an Inland Waterways Department. Federal Govt. Printer.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Nigeria. Statement of the Policy Proposed by the Government of the Federation for the Establishment of an Inland Waterways Department. Lagos: Federal Govt. Printer, 1956.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Nigeria. Statement of the Policy Proposed by the Government of the Federation for the Establishment of an Inland Waterways Department. Federal Govt. Printer, 1956.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.