Broberg, D. (1951). Directions for seed collecting and trading in forest seed and plants. Royal Board of Private Forestry of Sweden.
Chicago-Zitierstil (17. Ausg.)Broberg, David. Directions for Seed Collecting and Trading in Forest Seed and Plants. Stockholm: Royal Board of Private Forestry of Sweden, 1951.
MLA-Zitierstil (9. Ausg.)Broberg, David. Directions for Seed Collecting and Trading in Forest Seed and Plants. Royal Board of Private Forestry of Sweden, 1951.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.