Tiku, N. E., P. Saleh, P.R. Waziri-Ugwu, U. Ibrahim, and N. Nafisat. “Multinomial Logit Estimation of Income Sources by Watermelon Farmers in Northeastern Nigeria.” International Journal of Environment, Agriculture and Biotechnology 3, no. 4 (2018): 1441–49. https://doi.org/10.22161/ijeab/3.4.40.