Potash & Phosphate Institute (Atlanta, Ga.)\nInternational Plant Nutrition Institute. (1923). Better Crops With Plant Food. Potash & Phosphate Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPotash & Phosphate Institute (Atlanta, Ga.)\nInternational Plant Nutrition Institute. Better Crops With Plant Food. Atlanta, Ga: Potash & Phosphate Institute, 1923.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPotash & Phosphate Institute (Atlanta, Ga.)\nInternational Plant Nutrition Institute. Better Crops With Plant Food. Potash & Phosphate Institute, 1923.
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