Ahmad, K.Z.B (2001). The Association between Person, Work Environment, Job Satisfaction and Performance: A Study in Light Manufacturing Assembly Plants. Unpublished PhD thesis, University of Manchester Library.
Kerlinger, F. N. (1986). Foundations of Behavioral Research. Orlando, Florida: Holt, Rinehart & Winston, Inc.
Phillips, E. M. and Pugh, D. S. (2000). How to get a PhD. Buckingham: Open University Press.
"References." PhD: The Pursuit of Excellence. . Encyclopedia.com. (September 25, 2018). http://www.encyclopedia.com/education/applied-and-social-sciences-magazines/references
"References." PhD: The Pursuit of Excellence. . Retrieved September 25, 2018 from Encyclopedia.com: http://www.encyclopedia.com/education/applied-and-social-sciences-magazines/references