Potash & Phosphate Institute (Atlanta, Ga.)\nInternational Plant Nutrition Institute. (1923). Better Crops With Plant Food. Potash & Phosphate Institute.
Chicago-referens (17:e uppl.)Potash & Phosphate Institute (Atlanta, Ga.)\nInternational Plant Nutrition Institute. Better Crops With Plant Food. Atlanta, Ga: Potash & Phosphate Institute, 1923.
MLA-referens (8:e uppl.)Potash & Phosphate Institute (Atlanta, Ga.)\nInternational Plant Nutrition Institute. Better Crops With Plant Food. Potash & Phosphate Institute, 1923.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.