Jorgensen, F. a. O. (2023). Cost studies in European forestry. Royal College of Forestry, Stockholm.
Čikaški stil citiranja (17. izdanje)Jorgensen, Frits and Opheim. Cost Studies in European Forestry. Royal College of Forestry, Stockholm, 2023.
MLA način citiranja (9. izdanje)Jorgensen, Frits and Opheim. Cost Studies in European Forestry. Royal College of Forestry, Stockholm, 2023.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.