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শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিDelhi, Fertiliser Association of India. New. FAI Seminar 1979 on Critical Areas Affecting Fertiliser Consumption in India: Proceedings of the Seminar Held at New Delhi, Dec.13-15, 1975. The author, 1980.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিDelhi, Fertiliser Association of India. New. FAI Seminar 1979 on Critical Areas Affecting Fertiliser Consumption in India: Proceedings of the Seminar Held at New Delhi, Dec.13-15, 1975. The author, 1980.
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