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.
Cita Chicago (17th ed.)United Nations Economic Commission for Europe i Food and agriculture organization of the united nations. Forest Products Annual Market Review 1997-1998: Timber Bulletin. Vol. LI. No 3. 1998.
Cita MLA (9th ed.)United Nations Economic Commission for Europe i Food and agriculture organization of the united nations. Forest Products Annual Market Review 1997-1998: Timber Bulletin. Vol. LI. No 3. 1998.
Atenció: Aquestes cites poden no estar 100% correctes.