Symposium on Review of Nitrogen in the Tropics with Particular Reference to Pastures. (1962). A review of nitrogen in the tropics with particular reference to pastures: A symposium. Commonwealth Agricultural Bureaux.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Symposium on Review of Nitrogen in the Tropics with Particular Reference to Pastures. A Review of Nitrogen in the Tropics with Particular Reference to Pastures: A Symposium. England: Commonwealth Agricultural Bureaux, 1962.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Symposium on Review of Nitrogen in the Tropics with Particular Reference to Pastures. A Review of Nitrogen in the Tropics with Particular Reference to Pastures: A Symposium. Commonwealth Agricultural Bureaux, 1962.
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