Não informado. (1960). Greenhouse, garden, grass. Plant Research Institute, Department of Agriculture.
Chicago-Zitierstil (17. Ausg.)Não informado. Greenhouse, Garden, Grass. Ottawa: Plant Research Institute, Department of Agriculture, 1960.
MLA-Zitierstil (8. Ausg.)Não informado. Greenhouse, Garden, Grass. Plant Research Institute, Department of Agriculture, 1960.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.