Organisation for Economic Co-operation and Development. Statistics Directorate, International Monetary Fund. Bureau of Statistics, International Labour Organisation. Bureau of Statistics, & Commonwealth of Independent States. Statistical Committee. (2002). Measuring the non-observed economy: A handbook. OECD.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Organisation for Economic Co-operation and Development. Statistics Directorate, International Monetary Fund. Bureau of Statistics, International Labour Organisation. Bureau of Statistics, و Commonwealth of Independent States. Statistical Committee. Measuring the Non-observed Economy: A Handbook. Paris, France: OECD, 2002.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Organisation for Economic Co-operation and Development. Statistics Directorate, et al. Measuring the Non-observed Economy: A Handbook. OECD, 2002.