Não informado. (1960). Greenhouse, garden, grass. Plant Research Institute, Department of Agriculture.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Greenhouse, Garden, Grass. Ottawa: Plant Research Institute, Department of Agriculture, 1960.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Greenhouse, Garden, Grass. Plant Research Institute, Department of Agriculture, 1960.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.