Poon, Y. (1974). The oxidation and reduction of acid sulphate soils and its effect on the growth of the palm in Peninsular Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Poon, Yew-Chin. The Oxidation and Reduction of Acid Sulphate Soils and Its Effect on the Growth of the Palm in Peninsular Malaysia. 1974.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Poon, Yew-Chin. The Oxidation and Reduction of Acid Sulphate Soils and Its Effect on the Growth of the Palm in Peninsular Malaysia. 1974.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.