Wm H Waggaman. (1969). Phosphoric acid, phosphates and phosphatic fertilizers. London: Hafner.
शिकागो स्टाइल उद्धरणWm H Waggaman. Phosphoric Acid, Phosphates and Phosphatic Fertilizers. London: Hafner, 1969.
एमएलए उद्धरणWm H Waggaman. Phosphoric Acid, Phosphates and Phosphatic Fertilizers. London: Hafner, 1969.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.