Jorgensen, F. a. O. (2023). Cost studies in European forestry. Royal College of Forestry, Stockholm.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJorgensen, Frits and Opheim. Cost Studies in European Forestry. Royal College of Forestry, Stockholm, 2023.
एमएलए (9वां संस्करण) प्रशस्ति पत्रJorgensen, Frits and Opheim. Cost Studies in European Forestry. Royal College of Forestry, Stockholm, 2023.
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