Leach, J. W. (1971). Parliamentary integrity bill and the public officers integrity bill. Curriculum Branch, Department of Education.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Leach, Jerry W. Parliamentary Integrity Bill and the Public Officers Integrity Bill. Konedobu, P.N.G.: Curriculum Branch, Department of Education, 1971.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Leach, Jerry W. Parliamentary Integrity Bill and the Public Officers Integrity Bill. Curriculum Branch, Department of Education, 1971.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.