Leong, H. Y. (2016). Comparative study of organic and conventional vegetable farming systems using material and substance flow analysis / Leong Hong Yeng.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Leong, Hong Yeng. Comparative Study of Organic and Conventional Vegetable Farming Systems Using Material and Substance Flow Analysis / Leong Hong Yeng. 2016.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Leong, Hong Yeng. Comparative Study of Organic and Conventional Vegetable Farming Systems Using Material and Substance Flow Analysis / Leong Hong Yeng. 2016.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.