Jacobson, S. (2001). Fertilization to increase and sustain tree growth in coniferous stands in Sweden. Swedish University of Agricultural Sciences.
Lua i Stíl Chicago (17ú heag.)Jacobson, Staffan. Fertilization to Increase and Sustain Tree Growth in Coniferous Stands in Sweden. Uppsala: Swedish University of Agricultural Sciences, 2001.
Lua MLA (8ú heag.)Jacobson, Staffan. Fertilization to Increase and Sustain Tree Growth in Coniferous Stands in Sweden. Swedish University of Agricultural Sciences, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.