Nadeem, Abid Hussain, et al. “Factors Influencing Sustainable Production of Cotton in Pakistan: A Case Study From Bahawalpur District”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 11, no. 1, Oct. 2013, pp. 193-04, https://gssrr.org/JournalOfBasicAndApplied/article/view/1683.