Philippine Council for Agriculture and Resources Research and Development. (1983). The Philippines recommends for fertilizer usage. Philippine Council for Agriculture and Resources Research and Development.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Philippine Council for Agriculture and Resources Research and Development. The Philippines Recommends for Fertilizer Usage. Los Banos, Laguna: Philippine Council for Agriculture and Resources Research and Development, 1983.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Philippine Council for Agriculture and Resources Research and Development. The Philippines Recommends for Fertilizer Usage. Philippine Council for Agriculture and Resources Research and Development, 1983.
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