United Nations Economic Commission for Europe & Food and agriculture organization of the united nations. (1998). Forest products prices 1995-1997. Prix des produits forestiers 1995 - 1997: Timber Bulletin. Bulletien du bois. Vol. LI (1998) , No 1.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United Nations Economic Commission for Europe و Food and agriculture organization of the united nations. Forest Products Prices 1995-1997. Prix Des Produits Forestiers 1995 - 1997: Timber Bulletin. Bulletien Du Bois. Vol. LI (1998) , No 1. 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 Prices 1995-1997. Prix Des Produits Forestiers 1995 - 1997: Timber Bulletin. Bulletien Du Bois. Vol. LI (1998) , No 1. 1998.