Links:
[1] https://environment.iisuniv.ac.in/courses/subjects/research-methodology-5
[2] http://www.pearsoned.co.uk/Bookshop/Results.asp?iCurPage=1&Type=1&Author=Marc+Triola&Download=1&SearchTerm=Marc+Triola
[3] http://www.amazon.com/exec/obidos/search-handle-url/ref=ntt_athr_dp_sr_1?%5Fencoding=UTF8&search-type=ss&index=books&field-author=Bernard%20Rosner
[4] https://environment.iisuniv.ac.in/academic-year/2015-2016