United Nations Economic Commission for Europe & Food and agriculture organization of the united nations. (1998). Forest products annual market review 1997-1998: Timber Bulletin. Vol. LI. No 3.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United Nations Economic Commission for Europe و Food and agriculture organization of the united nations. Forest Products Annual Market Review 1997-1998: Timber Bulletin. Vol. LI. No 3. 1998.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)United Nations Economic Commission for Europe و Food and agriculture organization of the united nations. Forest Products Annual Market Review 1997-1998: Timber Bulletin. Vol. LI. No 3. 1998.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.