Não informado. (1968). Tropical agriculture research series. Ministry of Agriculture, Forestry and Fisheries, Tropical Agriculture Research Center.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Tropical Agriculture Research Series. Tokyo: Ministry of Agriculture, Forestry and Fisheries, Tropical Agriculture Research Center, 1968.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Tropical Agriculture Research Series. Ministry of Agriculture, Forestry and Fisheries, Tropical Agriculture Research Center, 1968.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.