Ahmed, R., M. Hussain, S. Ahmed, M. Karim, and M. Siddiky. “Effect of N, P and K Fertilizer on the Flower Yield of Chrysanthemum”. The Agriculturists, vol. 15, no. 1, Aug. 2017, pp. 58-67, doi:10.3329/agric.v15i1.33429.